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Limited Participation and Local Currency Sovereign Debt
Nicola Borri, LUISS, Rome
Kirill Shakhnov, EIEF, Rome
ADEMU Conference – Toulouse, 4 April 2018
Motivation
Large increase in the stock of EM sovereign bonds denominated in local currency
over last 15 years graph graph yields
Local currency ≈ US$4.2 trillions (2016)
Foreign currency ≈ US$900 billions (2016)
Large increase in foreign holdings of local currency EM debt graph graph table
The average share in local currency from ≈ 5% in 2004 to approximately 15% in
2016 (≈ US$600 billions)
Large differences across countries, and over time graph
The average share in foreign currency ≈ 45%
Extremely low government bond rates in developed countries after Great Recession graph
Questions
What explains the large increase in foreign holdings of local currency EM
sovereign bonds?
What are the implications of the change in currency composition of EM
government debt and in the shares held by foreign investors?
for EM: better and less risky funding costs?
for foreign investors: better portfolio diversification?
This Paper
We lay down a model with limited market participation and different investors
foreign investors are specialized in foreign currency denominated EM debt
local investors are specialized in local currency denominated EM debt
some foreign investors access both markets after paying entry cost
risk-aversion of foreign investors is time-varying and counter-cyclical
Main Findings
When risk-aversion is sufficiently low, benefits of investing in foreign markets are
greater than entry costs
The larger the share of foreign investors in the market for local currency bonds,
the higher their sensitivity to global shocks and correlation with foreign currency
bonds
Feeding actual U.S. interest rate data after the Great Recession to the model
results in strong increase in fraction of local currency debt held by foreigners
Literature
Segmented markets and limits to arbitrage: Gromb and Vayanos (2002);
Lamont and Thaler (2003); Gromb and Vayanos (2010); Gabaix and Maggiori
(2015); Greenwood et al. (2016)
Entry of foreign investors into local currency debt markets: Bekaert and
Harvey (2000), Eichengreen et al. (2007), Burger and Warnock (2006, 2007),
Alfaro et al. (2008), Hale et al. (2016), Du and Schreger (2016)
Sovereign bond prices and local&global shocks: Borri and Verdelhan (2011),
Longstaff et al. (2011), Ang and Longstaff (2013), Borri and Shakhnov (2017),
Borri (2017)
Outline
Motivation
Model: one risky asset
Model: two risky assets
Endogenous entry & time-varying risk aversion
Simulation
Conclusions
Outline
Motivation
Model: one risky asset
Model: two risky assets
Endogenous entry & time-varying risk aversion
Simulation
Conclusions
Model: a simplified framework
(1 asset, 1 investor, exchange rate & default risk)
Single risky asset and a single set of ”specialized” investors
Risky asset is a defaultable long-term bond denominated in local currency (LC)
Investors are foreigners with an objective function in foreign currency (FC) (e.g.,
U.S. hedge funds)
Investors have also access to short-term risk-free asset denominated in FC (e.g., a
U.S. T-bill)
Model: a simplified framework
(1 asset, 1 investor, exchange rate & default risk)
The risky asset is a portfolio of perpetual bonds with per-period coupon C
denominated in LC
Every period, a share ht of the bonds defaults and investors recover, in this case,
a fraction Lt
The return on the bond portfolio is
Rt+1 =
(1 − Zt+1)(Pt+1 + C)
Pt
,
where P is the bond price, and Zt+1 = ht+1Lt+1 the default realization at t + 1.
Model: a simplified framework
(1 asset, 1 investor, exchange rate & default risk)
Denote with St the exchange rate in units of LC per unit of FC (i.e., S ↑ is a LC
depreciation vis-`a-vis FC)
The return on the bond portfolio in FC is
Rt+1 =
(1 − Zt+1)(Pt+1 + C)
Pt
St
St+1
, (1)
where denotes variables in FC
Apply Campbell and Shiller (1988) log-linear approximation to (1)
rt+1 ≈ k + θpt+1 + (1 − θ)c − pt − zt+1 − ∆st+1, (2)
where θ = 1/(1 + exp (c − ¯p)), zt+1 = log(1 − Zt+1) and k is a constant of
approximation.
Model: a simplified framework
(1 asset, 1 investor, exchange rate & default risk)
From (2) derive expression for pt and solve forward
pt =
1
1 − θ
k + c −
∞
∑
i=0
θi
Et [rt+1+i + zt+1+i + ∆st+1+i ] (3)
Apply (3) to promised cash flows (i.e., zt+1+i = 0 ∀i) to get
pt =
1
1 − θ
k + c −
1
1 − θ
yt (4)
where yt is the yield-to-maturity in LC.
Use (4) in (2) and get
rt+1 ≈
1
1 − θ
yt −
θ
1 − θ
yt+1 − zt+1 − ∆st+1 (5)
Model: a simplified framework
(1 asset, 1 investor, exchange rate & default risk)
Exogenous risk-factors
1. short-term risk-free rate: rf
2. default realization: z
3. risky asset supply: q
4. exchange rate: ∆s
Let x = rf − ¯rf zt+1 − ¯z qt+1 − ¯q ∆st+1 − ∆¯s and
= rf z q ∆s
Assume xt+1 = xt Γ + t+1, where Σ is the variance-covariance matrix of the
vector of innovations t+1
Model: a simplified framework
(1 asset, 1 investor, exchange rate & default risk)
A mass 1 of specialized foreign investors with risk tolerance τ purchases the risky
long-term bonds in LC and the short-term risk-free asset in FC.
Investors are concerned with interim wealth at t + 1 and have mean-variance
preferences
max
bt
btEt (rxt+1) − (2τ)−1
b2
t Vart (rxt+1) ,
where rxt+1 = rt+1 − rf ,t
FOC
Et (rxt+1) = (1/τ)btV (1)
(6)
where V (1) = Vart (rxt+1) is the equilibrium variance.
Model: a simplified framework
(1 asset, 1 investor, exchange rate & default risk)
We conjecture that equilibrium yield takes a linear form in the vector of states
yt = α0 + α xt (7)
and pick α0 and α so that market-clearing holds equilibrium selection
The excess return
Et [rxt+1] = (α0 − ¯r − ¯z − ∆¯s) +
1
1 − θ
α − er xt −
θ
1 − θ
α + ez + e∆s Γxt.
where ei is a vector of all zeros and 1 in position i
Conditional variance
V (1)
=
θ
1 − θ
α + ez,∆s Σ
θ
1 − θ
α + ez,∆s
Market clearing: bt = qt
Model: a simplified framework
(1 asset, 1 investor, exchange rate & default risk)
Combining (6)–(7) we get a closed-form expression for the equilibrium yield when Γ and
Σ are diagonal diagonal Γ and Σ
yt =
interest rate risk premium
¯r +
1 − θ
1 − ρr θ
(rt − ¯r ) +
default rate risk premium
¯z +
1 − θ
1 − ρz θ
ρz (zt − ¯z) +
exchange rate risk premium
∆¯s +
1 − θ
1 − ρ∆s θ
(∆st − ∆¯s)
+
V (1)
τ
( ¯q)
unconditional term premium
+
V (1)
τ
1 − θ
1 − ρqθ
(qt − ¯q)
conditional term premium
Note that
the yield is more sensitive to the risk factors the higher their persistence
the risk-tolerance parameter τ shows up only in the last two terms (i.e, term
premium)
Outline
Motivation
Model: one risky asset
Model: two risky assets
Endogenous entry & time-varying risk aversion
Simulation
Conclusions
A Model with Partially Segmented Markets
(2 risky assets, 3 investors, exchange rate & default risk)
Build on Greenwood et al. (2016) and Gromb and Vayanos (2002) differences wrt GHL
Three assets
1. risky long-term local currency bond (A)
2. risky long-term foreign currency denominated bond (B)
3. short-term risk free in foreign currency
Three types of investors
1. nA specialists in A debt
2. nB specialists in B debt
3. 1 − nB − nA generalists in both A and B debt
All investors have same mean-variance preferences with risk tolerance τ
A Model with Partially Segmented Markets
(2 assets, 3 investors, exchange rate & default risk)
Returns on the perpetual bonds
RA,t+1 =
(1 − ZA
t+1)(PA,t+1 + CA)
PA,t
RB,t+1 =
(1 − ZB
t+1)(PB,t+1 + CB )
PB,t
denotes variables in foreign currency (i.e., U.S. dollar).
A Model with Partially Segmented Markets
(2 assets, 3 investors, exchange rate & default risk)
Apply Campbell and Shiller (1988) log-linear approximation
rxA,t+1 ≈
1
1 − θA
yA,t −
θA
1 − θA
yA,t+1 − zA
t+1 − rt,
rxA,t+1 ≈
1
1 − θA
yA,t −
θA
1 − θA
yA,t+1 − zA
t+1 − rt − ∆st+1,
rxB,t+1 ≈
1
1 − θB
yB,t −
θB
1 − θB
yB,t+1 − zB
t+1 − rt ,
Note that investors differ with respect to their source of funding
A Model with Partially Segmented Markets
(2 assets, 3 investors, exchange rate & default risk)
Exogenous Risk Factors
1. global and local risk r and r
2. default risk zi i = {A, B}
3. supply shocks qi i = {A, B}
4. exchange rate risk ∆s
A Model with Partially Segmented Markets
(2 assets, 3 investors, exchange rate & default risk)
Specialists maximize a quadratic utility function
max
bt
btEt [rxt+1] − (2τ)−1
b2
t Vart [rxt+1] ,
and their optimality conditions are
bA,t = τA
Et [rxA,t+1]
Vart [rxA,t+1]
, bB,t = τB
Et rxB,t+1
Vart rxB,t+1
A Model with Partially Segmented Markets
(2 assets, 3 investors, exchange rate & default risk)
Generalists maximize the same quadratic utility function
max
dA,t ,dB,t
Et [rxdt ,t+1] − (2τB )−1
Vart [rxdt ,t+1] ,
where rxdt ,t+1 = dA,trxA,t+1 + dB,trxB,t+1
The optimality condition for generalists is
dA,t
dB,t
=
τB
1 − R2
A,B



Et [rxA,t+1]
Vart [rxA,t+1]
− βB|A
Et [rxB,t+1]
Vart [rxB,t+1]
Et [rxB,t+1]
Vart [rxB,t+1]
− βA|B
Et [rxA,t+1]
Vart [rxA,t+1]



where βA|B, βB|A are OLS slope coefficients in regressions of rxA,t+1 on rxB,t+1,
and vice-versa, and R2
A,B the corresponding R-square
A Model with Partially Segmented Markets
(2 assets, 3 investors, exchange rate & default risk)
Market clearing
nAbA,t + (1 − nA − nB )dA,t = qA,t
nBbB,t + (1 − nA − nB )dB,t = qB,t
Outline
Motivation
Model: one risky asset
Model: two risky assets
Endogenous entry & time-varying risk aversion
Simulation
Conclusions
Endogenous Entry
We now introduce endogenous entry of foreign investors in the market for LC
bonds and time-varying risk tolerance
when generalists invest in the LC asset, they must pay a per period fix cost ψ
specialists in asset B every period can decide whether to become generalists, pay the
fee ψt and invest also in asset A
the entry condition for specialists in B is
∆u ≡ ug
t − us,B
t = ψt (8)
where ug
t is utility for generalists and us,B
t of specialists in B in t
The entry cost is a proxy for transaction costs in order to operate in the local
market and/or development of local financial market
Endogenous Entry
The utility of specialists is
us,B
t =
τB,t+1
2
x2
B (9)
where xB =
Et [rxB,t+1]
Vart [rxB,t+1]
denotes the risk-adjusted return on asset B
The utility of generalists is
ug
t =
τB,t+1
2 (1 + corAB,t )
x2
A − xAxBcorAB,t
(1 − corAB,t )
+
x2
B − xAxBcorAB,t
(1 − corAB,t )
where xA are the risk-adjusted return on A and corAB,t the correlation coefficient
between the conditional excess returns on the two assets
Time-Varying Risk Aversion
We introduce time-varying risk aversion in a reduce form
we assume that local investors risk-tolerance is constant and equal to ¯τA
the risk-tolerance of foreign investors is instead a function of state variables
τB,t+1 = ¯τB + κ xt (10)
where κ is a vector of loadings on the states
note that τB,t+1 is pre-determined at t and is taken as given by investors in their
portfolio decisions
in empirical estimation we simply assume the only non-zero coefficient of κ is for the
risk-free rate in foreign currency (i.e., τB,t+1 high when interest rate is low)
this could be endogeneized in model with habit preferences when the intertemporal
substitution effect dominates the precautionary saving effect
Outline
Motivation
Model: one risky asset
Model: two risky assets
Endogenous entry & time-varying risk aversion
Simulation
Conclusions
Simulation (I/II)
Collect all bond issuance with initial maturity of more than 1 year since 1988 for
Brazil from Bloomberg (in LC and FC) and aggregate data at monthly frequency
(price, quantity, and rating at issuance)
Estimate Γ and Σ using data for Brazil
rt return on the US t-bills, rt return on money market Brazilian rate
zt = ∑
Nt
k=1
Rk,t Ik,t
∑
Nt
k=1 Ik,t
the weighted average of ratings at the issuance (in LC and FC
respectively)
qt =
∑T
i=0 ∑
Nt−i
k=1 Ik,t−i −Mk,t−i
GDPt
the cumulative net issuance of bonds over GDP (in LC
and FC respectively)
∆st Brazilian Real to U.S. dollar spot rate
Simulation (I/II)
1. Simulate model for constant values of risk tolerance and grid of values for the
fraction of generalists
2. Impulse responses when fraction of generalists is small and equal to 30% (i.e.,
average value for Brazil) and large and equal to 70%
3. Estimation of utility difference ∆u between generalists and specialists in asset B
for different values of the fraction of generalists and risk tolerance
4. Feed model actual U.S. short-term interest rate after Great Recession to estimate
time-varying risk tolerance of foreign investors and equilibrium fraction of
generalists
Fixed Number of Generalists (I/II)
0 0.2 0.4 0.6 0.8 1
fraction of generalists
2
2.5
3
3.5
4
4.5
mean yields (%)
yA
yB
0 0.2 0.4 0.6 0.8 1
fraction of generalists
0
0.2
0.4
0.6
0.8
1
1.2
Var returns (%)
VarA
VarB
0 0.2 0.4 0.6 0.8 1
fraction of generalists
0.045
0.05
0.055
0.06
0.065
0.07
correlation of returns
0 0.2 0.4 0.6 0.8 1
fraction of generalists
0.38
0.4
0.42
0.44
0.46
entry
u
Fixed Number of Generalists (II/II)
LC bonds have larger yields and variance of returns regardless of fraction of
generalists
LC bonds yield declines a bit with fraction of generalists
When the fraction of generalists increases, the correlation between LC and FC
bond returns increases
Fraction of generalists ≈ 30%
IRFs (I/II)
0 5 10 15 20
2
4
6
8
10
12
%
shock to rf
us
0 5 10 15 20
-0.01
0
0.01
0.02
0.03
0.04
%
shock to s
yA
(low fract)
yA
(high fract)
yB
(low fract)
yB
(high fract)
0 5 10 15 20
1
2
3
4
5
6
%
shock to zB
0 5 10 15 20
0
5
10
15
20
%
shock to zA
IRFs (II/II)
shock to U.S. short term rate affects more FC bond yields, and LC bond yields
when fraction of generalists is large
shock to exchange rate affects only LC bonds, and the more so the larger the
fraction of generalists
shocks to the default realization of FC bonds affects also LC bonds when fraction
of generalists is large
shocks to the default realization of LC bonds affects mostly LC bonds, and the
more so the lower the fraction of generalists
Entry (I/II)
1.5
200
2
2.5
3
150 0.95
10
-4
3.5
0.9
4
u
0.85100
4.5
0.8
generalists (%)
5
0.75
50 0.7
0.65
0 0.6
Entry (II/II)
For a given level of risk tolerance, the benefits of becoming generalists decline
with the share of generalists
For a given level of the share of generalists, the benefits of becoming generalists
increase with the risk tolerance
Entry after the Great Recession
Conclusion
We build a model of partially segmented markets where foreign investors are
specialized in EM bonds in FC and local investors in LC, and foreign investors can
also invest in LC bonds after paying a fee
- for a given fee level, benefits to foreign investors from entering the LC bond market
are larger the lower their risk aversion
- the sensitivity to global shocks of LC bonds is higher the larger the share of foreign
investors in the market for LC bonds
- when foreign investors’ risk aversion is positively correlated to U.S. short-term
interest rates, the model predicts the significant increase in the share of LC bonds
held by foreign investors that we observe in the data after the Great Recession
The model can be used to study counterfactual scenarios, like the effect of the
exit of the Fed from the low interest rate environment
Thank you!
Additional Slides
Aggregate EM Debt
(in USD)
2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
AssetsinUSDbillions
local currency
foreign currency
back to motivation
Aggregate Foreign EM Debt Holdings Shares
(as % of local and foreign currency debt)
2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016
0
10
20
30
40
50
60
70
Assetsas%ofEMdebtinlocalandforeigncurrency
local currency
foreign currency
back to motivation
Aggregate Foreign EM Debt Holdings
(as % of EM GDP)
2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016
0.5
1
1.5
2
2.5
3
3.5
Assetsas%ofEMGDP
local currency
foreign currency
back to motivation
Foreign Holdings of EM Government Debt Securities in Local Currency (%
of total)
back to motivation
The risk free rate
2002 2004 2006 2008 2010 2012 2014 2016 2018
0
1
2
3
4
5
6
back to motivation Notes: Yield on 3-Month Treasury Bill
Differences in default risk?
mean absolute differences in credit ratings
Brazil
C
hile
C
hinaC
olom
biaH
ungary
IndiaIndonesiaM
alaysia
M
exico
Peru
Philippines
PolandR
om
ania
R
ussia
South
Africa
Turkey
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
Figure: This figure plots the mean absolute difference in credit ratings on debt denominated in foreign and
local currency. Credit ratings are from S&P for the period 2002:3–2016:12 and are converted in a numerical
ordering with AAA=1 and SD=16 simple differences in ratings .
Local currency market negligible?
local currency debt: share of total governmebt debt (2016:Q3, %)
Brazil
C
hile
C
hinaC
olom
biaH
ungary
IndiaIndonesiaM
alaysia
M
exico
Peru
Philippines
PolandR
om
ania
R
ussia
South
Africa
Turkey
0
10
20
30
40
50
60
70
80
90
100
Figure: Local currency debt as a share of total government debt at 2016:Q3. Data are from a sample of 16
emerging countries from Arslanalp and Tsuda (2014).
Market integration?
local currency debt: share held by foreign investors (2016:Q3,%)
Brazil
C
hile
C
hinaC
olom
biaH
ungary
IndiaIndonesiaM
alaysia
M
exico
Peru
Philippines
PolandR
om
ania
R
ussia
South
Africa
Turkey
0
5
10
15
20
25
30
35
Figure: Share of local currency debt held by foreign investors in 2016:Q3. Data are from a sample of 16
emerging countries from Arslanalp and Tsuda (2014).
Simple differences in credit ratings
mean differences in credit ratings
Brazil
C
hile
C
hinaC
olom
biaH
ungary
IndiaIndonesiaM
alaysia
M
exico
Peru
Philippines
PolandR
om
ania
R
ussia
South
Africa
Turkey
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
Figure: This figure plots the mean difference in credit ratings on debt denominated in foreign and local
currency. Credit ratings are from S&P for the period 2002:3–2016:12 and are converted in a numerical ordering
with AAA=1 and SD=16 back .
Data
Figure: Yields on local and foreign currency denominated government debt. Yields on local currency debt are
from the J.P. Morgan GBI-Broad indices. Yields on foreign currency denominated debt are from J.P. Morgan
EMBI Plus indices. Data are at monthly frequency for the period 2002:3–2016:12.
MODEL
Asset Pricing (Standard Model)
If the LOP holds, and investors can form portfolios freely, there exists a SDF Mt+1 that
prices any excess return Re,i
t+1:
Et Mt+1Re,i
t+1 = 0
Assuming that returns and SDF are lognormal, the Euler equation implies
Et (re,i
t+1) = −
covt (mt+1, re,i
t+1)
vart (mt+1)
βi
t
vart (mt+1)
λt
where lower cases denote logs.
If M is an excess return, its market price of risk λ should be equal to its mean as beta is
equal to 1 (no-arbitrage condition).
back
Special case: Γ and Σ diagonal (single asset model)
In order to get simple closed-form solutions, it is convenient to take Γ and Σ as
diagonal matrices
Γ =




ρr 0 0 0
0 ρz 0 0
0 0 ρq 0
0 0 0 ρ∆s



 , Σ =




σ2
r 0 0 0
0 σ2
z 0 0
0 0 σ2
q 0
0 0 0 σ2
∆s




back
Model: a simplified framework
(1 asset, 1 investor, exchange rate & default risk)
Combining (6)–(??) we get expression for the excess holding period return for the
foreign investor is
Et [rxt+1] =
interest rate risk premium
τ−1 θ
1 − ρr θ
σ r
2
qt +
credit risk premium
τ−1 1
1 − ρr θ
σ z
2
qt +
+
1
1 − ρr θ
σ ∆s
2
qt
exchange rate risk premium
+ τ−1 θ
1 − ρr θ
σ q
2
V (1)
2
qt
supply risk premium
(11)
back
Solution: general case
Formally, we conjecture that the long-term yields in market A and B are
yA,t = αA0 + αA1xt,
yB,t = αB0 + αB1xt,
the demands of generalists are
dA,t = δA0 + δA1xt,
dB,t = δB0 + δB1xt,
Solution: general case
3 Variances and covariance
VI = ∑
J
θI
1 − θI
αI,J
2
σ2
J , I = {A, B, C}, J = {r , z, ∆s, qA, qB }
CA,B = ∑
J
θAθB
(1 − θA)(1 − θB )
αC,J αB,J
2
σ2
J , J = {r , z, qA, qB }
Generalists demand δA1 as a function of αA1
δA0 = τ
VB (αC0 − ¯r − ¯z − ∆¯s) − CA,B (αB0 − ¯r − ¯z)
VAVB − (CA,B )2
,
δA1 = τ




VB
1
1−θA
αC1 − er − θA
1−θA
αC1 + ez + e∆s Γ
−CA,B
1
1−θB
αB1 − er −
θB
1−θB
αB1 + ez Γ




VAVB − (CA,B )2
back
Equilibrium Selection
In a similar framework, GHL show that a linear equilibrium exists only if investors
are sufficiently risk-tolerant (i.e., if τ is large enough)
When investors are sufficiently risk tolerant, there two types of solutions
1. yields are highly sensitive to supply shocks and bonds very risky so that investors
want to be compensated with large returns (i.e., large changes in yields)
2. yields are less sensitive to supply shocks and bonds less risky, so that investors
require smaller returns
Following GHL, we focus on the solution that implies that yields are less sensitive
to changes in their own supply
it is possible to show that the first root is explosive when σ q→∞
back
Differences with respect to GHL
1. We assume that both assets are defaultable long-term bonds
2. We introduce exchange rate risk
3. We assume that foreign investors are specialized in FC bonds, and local investors
in LC bonds
4. We assume that generalist investors invest in both markets
5. We introduce endogenous entry in the pool of generalists
6. We assume that foreign investors have time-varying risk aversion tied to the
risk-less U.S. short-term interest rate
back
Table: Foreign holdings shares
Min Max Mean Min Max Mean
foreign currency (%) local currency (%)
Brazil 5.36 30.75 16.80 0.99 20.27 8.36
Chile 85.50 100.00 99.32 3.14 8.86 5.75
China 0.09 2.09 0.90 0.00 3.18 0.57
Colombia 46.02 65.47 51.04 4.46 22.27 8.37
Hungary 38.95 72.70 53.55 21.04 43.65 30.08
India 0.00 0.01 0.00 0.12 4.03 1.23
Indonesia 1.16 40.79 13.52 1.63 39.63 19.96
Malaysia 0.00 41.24 21.31 12.37 37.34 24.49
Mexico 57.99 100.00 100.00 4.36 37.99 18.50
Peru 16.39 60.71 28.99 0.00 56.61 27.61
Philippines 40.22 100.00 61.14 0.00 14.63 5.16
Poland 32.65 64.11 51.48 13.33 41.89 25.38
Romania 11.94 40.41 27.52 5.40 22.38 15.89
Russia 10.49 38.00 24.11 0.12 23.12 6.42
South Africa 23.14 40.72 30.97 6.54 38.01 18.97
Turkey 17.79 58.91 34.44 5.08 24.48 13.34
back
A Model with Partially Segmented Markets
(2 assets, 3 investors, exchange rate & default risk)
Formally, we say that markets are integrated if a conditional CAPM model prices
both assets
Et [rxt+1] = τ−1
B Vart [rxt+1]st = βt [rxt+1, rxM,t+1]Et [rxM,t+1],
where rxM,t+1 = strxt+1 is the market portfolio.
In our framework, for each asset
rxi,t+1 − Et [rxi,t+1] = φ t+1
where φ = φA φB contains the factor loadings of each asset on the factor
innovations.
If 1 − nA − nB = 1, then
Et [rxt+1] = τ−1
Vart [rxt+1]st = φ τ−1
Σφ st
λt
References I
Alfaro, L., S. Kalemli-Ozcan, and V. Volosovych (2008): “Why doesn’t capital flow from
rich to poor countries? An empirical investigation,” The Review of Economics and Statistics, 90,
347–368.
Ang, A. and F. A. Longstaff (2013): “Systemic sovereign credit risk: Lessons from the US and
Europe,” Journal of Monetary Economics, 60, 493–510.
Arslanalp, M. S. and M. T. Tsuda (2014): Tracking global demand for emerging market
sovereign debt, 14-39, International Monetary Fund.
Bekaert, G. and C. R. Harvey (2000): “Foreign speculators and emerging equity markets,” The
Journal of Finance, 55, 565–613.
Borri, N. (2017): “Local Currency Systemic Risk,” Emerging Markets Review, Forthcoming.
Borri, N. and K. Shakhnov (2017): “Global Risk in Long-Term Sovereign Debt,” Mimeo.
Borri, N. and A. Verdelhan (2011): “Sovereign Risk Premia,” Mimeo.
Burger, J. D. and F. E. Warnock (2006): “Local currency bond markets,” Tech. rep., National
Bureau of Economic Research.
——— (2007): “Foreign participation in local currency bond markets,” Review of Financial
Economics, 16, 291–304.
References II
Campbell, J. Y. and R. J. Shiller (1988): “Stock prices, earnings, and expected dividends,” The
Journal of Finance, 43, 661–676.
Chinn, M. D. and H. Ito (2006): “What matters for financial development? Capital controls,
institutions, and interactions,” Journal of development economics, 81, 163–192.
Du, W. and J. Schreger (2016): “Local currency sovereign risk,” The Journal of Finance.
Eichengreen, B., R. Hausmann, and U. Panizza (2007): “Currency mismatches, debt
intolerance, and the original sin: Why they are not the same and why it matters,” in Capital
controls and capital flows in emerging economies: Policies, practices and consequences, University of
Chicago Press, 121–170.
Gabaix, X. and M. Maggiori (2015): “International liquidity and exchange rate dynamics,” The
Quarterly Journal of Economics, 130, 1369–1420.
Greenwood, R., S. G. Hanson, and G. Y. Liao (2016): “Asset Price Dynamics in Partially
Segmented Markets,” Harvard Business School Working Paper.
Gromb, D. and D. Vayanos (2002): “Equilibrium and welfare in markets with financially
constrained arbitrageurs,” Journal of Financial Economics, 66, 361–407.
——— (2010): “Limits of arbitrage,” Annu. Rev. Financ. Econ., 2, 251–275.
Hale, G. B., P. Jones, and M. M. Spiegel (2016): “The rise in home currency issuance,”
Federal Reserve Bank of San Francisco Working Paper, 19.
References III
Lamont, O. A. and R. H. Thaler (2003): “Can the market add and subtract? Mispricing in tech
stock carve-outs,” Journal of Political Economy, 111, 227–268.
Longstaff, F. A., J. Pan, L. H. Pedersen, and K. J. Singleton (2011): “How sovereign is
sovereign credit risk?” American Economic Journal: Macroeconomics, 3, 75–103.

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Limited participation and local currency sovereign debt

  • 1. Limited Participation and Local Currency Sovereign Debt Nicola Borri, LUISS, Rome Kirill Shakhnov, EIEF, Rome ADEMU Conference – Toulouse, 4 April 2018
  • 2. Motivation Large increase in the stock of EM sovereign bonds denominated in local currency over last 15 years graph graph yields Local currency ≈ US$4.2 trillions (2016) Foreign currency ≈ US$900 billions (2016) Large increase in foreign holdings of local currency EM debt graph graph table The average share in local currency from ≈ 5% in 2004 to approximately 15% in 2016 (≈ US$600 billions) Large differences across countries, and over time graph The average share in foreign currency ≈ 45% Extremely low government bond rates in developed countries after Great Recession graph
  • 3. Questions What explains the large increase in foreign holdings of local currency EM sovereign bonds? What are the implications of the change in currency composition of EM government debt and in the shares held by foreign investors? for EM: better and less risky funding costs? for foreign investors: better portfolio diversification?
  • 4. This Paper We lay down a model with limited market participation and different investors foreign investors are specialized in foreign currency denominated EM debt local investors are specialized in local currency denominated EM debt some foreign investors access both markets after paying entry cost risk-aversion of foreign investors is time-varying and counter-cyclical
  • 5. Main Findings When risk-aversion is sufficiently low, benefits of investing in foreign markets are greater than entry costs The larger the share of foreign investors in the market for local currency bonds, the higher their sensitivity to global shocks and correlation with foreign currency bonds Feeding actual U.S. interest rate data after the Great Recession to the model results in strong increase in fraction of local currency debt held by foreigners
  • 6. Literature Segmented markets and limits to arbitrage: Gromb and Vayanos (2002); Lamont and Thaler (2003); Gromb and Vayanos (2010); Gabaix and Maggiori (2015); Greenwood et al. (2016) Entry of foreign investors into local currency debt markets: Bekaert and Harvey (2000), Eichengreen et al. (2007), Burger and Warnock (2006, 2007), Alfaro et al. (2008), Hale et al. (2016), Du and Schreger (2016) Sovereign bond prices and local&global shocks: Borri and Verdelhan (2011), Longstaff et al. (2011), Ang and Longstaff (2013), Borri and Shakhnov (2017), Borri (2017)
  • 7. Outline Motivation Model: one risky asset Model: two risky assets Endogenous entry & time-varying risk aversion Simulation Conclusions
  • 8. Outline Motivation Model: one risky asset Model: two risky assets Endogenous entry & time-varying risk aversion Simulation Conclusions
  • 9. Model: a simplified framework (1 asset, 1 investor, exchange rate & default risk) Single risky asset and a single set of ”specialized” investors Risky asset is a defaultable long-term bond denominated in local currency (LC) Investors are foreigners with an objective function in foreign currency (FC) (e.g., U.S. hedge funds) Investors have also access to short-term risk-free asset denominated in FC (e.g., a U.S. T-bill)
  • 10. Model: a simplified framework (1 asset, 1 investor, exchange rate & default risk) The risky asset is a portfolio of perpetual bonds with per-period coupon C denominated in LC Every period, a share ht of the bonds defaults and investors recover, in this case, a fraction Lt The return on the bond portfolio is Rt+1 = (1 − Zt+1)(Pt+1 + C) Pt , where P is the bond price, and Zt+1 = ht+1Lt+1 the default realization at t + 1.
  • 11. Model: a simplified framework (1 asset, 1 investor, exchange rate & default risk) Denote with St the exchange rate in units of LC per unit of FC (i.e., S ↑ is a LC depreciation vis-`a-vis FC) The return on the bond portfolio in FC is Rt+1 = (1 − Zt+1)(Pt+1 + C) Pt St St+1 , (1) where denotes variables in FC Apply Campbell and Shiller (1988) log-linear approximation to (1) rt+1 ≈ k + θpt+1 + (1 − θ)c − pt − zt+1 − ∆st+1, (2) where θ = 1/(1 + exp (c − ¯p)), zt+1 = log(1 − Zt+1) and k is a constant of approximation.
  • 12. Model: a simplified framework (1 asset, 1 investor, exchange rate & default risk) From (2) derive expression for pt and solve forward pt = 1 1 − θ k + c − ∞ ∑ i=0 θi Et [rt+1+i + zt+1+i + ∆st+1+i ] (3) Apply (3) to promised cash flows (i.e., zt+1+i = 0 ∀i) to get pt = 1 1 − θ k + c − 1 1 − θ yt (4) where yt is the yield-to-maturity in LC. Use (4) in (2) and get rt+1 ≈ 1 1 − θ yt − θ 1 − θ yt+1 − zt+1 − ∆st+1 (5)
  • 13. Model: a simplified framework (1 asset, 1 investor, exchange rate & default risk) Exogenous risk-factors 1. short-term risk-free rate: rf 2. default realization: z 3. risky asset supply: q 4. exchange rate: ∆s Let x = rf − ¯rf zt+1 − ¯z qt+1 − ¯q ∆st+1 − ∆¯s and = rf z q ∆s Assume xt+1 = xt Γ + t+1, where Σ is the variance-covariance matrix of the vector of innovations t+1
  • 14. Model: a simplified framework (1 asset, 1 investor, exchange rate & default risk) A mass 1 of specialized foreign investors with risk tolerance τ purchases the risky long-term bonds in LC and the short-term risk-free asset in FC. Investors are concerned with interim wealth at t + 1 and have mean-variance preferences max bt btEt (rxt+1) − (2τ)−1 b2 t Vart (rxt+1) , where rxt+1 = rt+1 − rf ,t FOC Et (rxt+1) = (1/τ)btV (1) (6) where V (1) = Vart (rxt+1) is the equilibrium variance.
  • 15. Model: a simplified framework (1 asset, 1 investor, exchange rate & default risk) We conjecture that equilibrium yield takes a linear form in the vector of states yt = α0 + α xt (7) and pick α0 and α so that market-clearing holds equilibrium selection The excess return Et [rxt+1] = (α0 − ¯r − ¯z − ∆¯s) + 1 1 − θ α − er xt − θ 1 − θ α + ez + e∆s Γxt. where ei is a vector of all zeros and 1 in position i Conditional variance V (1) = θ 1 − θ α + ez,∆s Σ θ 1 − θ α + ez,∆s Market clearing: bt = qt
  • 16. Model: a simplified framework (1 asset, 1 investor, exchange rate & default risk) Combining (6)–(7) we get a closed-form expression for the equilibrium yield when Γ and Σ are diagonal diagonal Γ and Σ yt = interest rate risk premium ¯r + 1 − θ 1 − ρr θ (rt − ¯r ) + default rate risk premium ¯z + 1 − θ 1 − ρz θ ρz (zt − ¯z) + exchange rate risk premium ∆¯s + 1 − θ 1 − ρ∆s θ (∆st − ∆¯s) + V (1) τ ( ¯q) unconditional term premium + V (1) τ 1 − θ 1 − ρqθ (qt − ¯q) conditional term premium Note that the yield is more sensitive to the risk factors the higher their persistence the risk-tolerance parameter τ shows up only in the last two terms (i.e, term premium)
  • 17. Outline Motivation Model: one risky asset Model: two risky assets Endogenous entry & time-varying risk aversion Simulation Conclusions
  • 18. A Model with Partially Segmented Markets (2 risky assets, 3 investors, exchange rate & default risk) Build on Greenwood et al. (2016) and Gromb and Vayanos (2002) differences wrt GHL Three assets 1. risky long-term local currency bond (A) 2. risky long-term foreign currency denominated bond (B) 3. short-term risk free in foreign currency Three types of investors 1. nA specialists in A debt 2. nB specialists in B debt 3. 1 − nB − nA generalists in both A and B debt All investors have same mean-variance preferences with risk tolerance τ
  • 19. A Model with Partially Segmented Markets (2 assets, 3 investors, exchange rate & default risk) Returns on the perpetual bonds RA,t+1 = (1 − ZA t+1)(PA,t+1 + CA) PA,t RB,t+1 = (1 − ZB t+1)(PB,t+1 + CB ) PB,t denotes variables in foreign currency (i.e., U.S. dollar).
  • 20. A Model with Partially Segmented Markets (2 assets, 3 investors, exchange rate & default risk) Apply Campbell and Shiller (1988) log-linear approximation rxA,t+1 ≈ 1 1 − θA yA,t − θA 1 − θA yA,t+1 − zA t+1 − rt, rxA,t+1 ≈ 1 1 − θA yA,t − θA 1 − θA yA,t+1 − zA t+1 − rt − ∆st+1, rxB,t+1 ≈ 1 1 − θB yB,t − θB 1 − θB yB,t+1 − zB t+1 − rt , Note that investors differ with respect to their source of funding
  • 21. A Model with Partially Segmented Markets (2 assets, 3 investors, exchange rate & default risk) Exogenous Risk Factors 1. global and local risk r and r 2. default risk zi i = {A, B} 3. supply shocks qi i = {A, B} 4. exchange rate risk ∆s
  • 22. A Model with Partially Segmented Markets (2 assets, 3 investors, exchange rate & default risk) Specialists maximize a quadratic utility function max bt btEt [rxt+1] − (2τ)−1 b2 t Vart [rxt+1] , and their optimality conditions are bA,t = τA Et [rxA,t+1] Vart [rxA,t+1] , bB,t = τB Et rxB,t+1 Vart rxB,t+1
  • 23. A Model with Partially Segmented Markets (2 assets, 3 investors, exchange rate & default risk) Generalists maximize the same quadratic utility function max dA,t ,dB,t Et [rxdt ,t+1] − (2τB )−1 Vart [rxdt ,t+1] , where rxdt ,t+1 = dA,trxA,t+1 + dB,trxB,t+1 The optimality condition for generalists is dA,t dB,t = τB 1 − R2 A,B    Et [rxA,t+1] Vart [rxA,t+1] − βB|A Et [rxB,t+1] Vart [rxB,t+1] Et [rxB,t+1] Vart [rxB,t+1] − βA|B Et [rxA,t+1] Vart [rxA,t+1]    where βA|B, βB|A are OLS slope coefficients in regressions of rxA,t+1 on rxB,t+1, and vice-versa, and R2 A,B the corresponding R-square
  • 24. A Model with Partially Segmented Markets (2 assets, 3 investors, exchange rate & default risk) Market clearing nAbA,t + (1 − nA − nB )dA,t = qA,t nBbB,t + (1 − nA − nB )dB,t = qB,t
  • 25. Outline Motivation Model: one risky asset Model: two risky assets Endogenous entry & time-varying risk aversion Simulation Conclusions
  • 26. Endogenous Entry We now introduce endogenous entry of foreign investors in the market for LC bonds and time-varying risk tolerance when generalists invest in the LC asset, they must pay a per period fix cost ψ specialists in asset B every period can decide whether to become generalists, pay the fee ψt and invest also in asset A the entry condition for specialists in B is ∆u ≡ ug t − us,B t = ψt (8) where ug t is utility for generalists and us,B t of specialists in B in t The entry cost is a proxy for transaction costs in order to operate in the local market and/or development of local financial market
  • 27. Endogenous Entry The utility of specialists is us,B t = τB,t+1 2 x2 B (9) where xB = Et [rxB,t+1] Vart [rxB,t+1] denotes the risk-adjusted return on asset B The utility of generalists is ug t = τB,t+1 2 (1 + corAB,t ) x2 A − xAxBcorAB,t (1 − corAB,t ) + x2 B − xAxBcorAB,t (1 − corAB,t ) where xA are the risk-adjusted return on A and corAB,t the correlation coefficient between the conditional excess returns on the two assets
  • 28. Time-Varying Risk Aversion We introduce time-varying risk aversion in a reduce form we assume that local investors risk-tolerance is constant and equal to ¯τA the risk-tolerance of foreign investors is instead a function of state variables τB,t+1 = ¯τB + κ xt (10) where κ is a vector of loadings on the states note that τB,t+1 is pre-determined at t and is taken as given by investors in their portfolio decisions in empirical estimation we simply assume the only non-zero coefficient of κ is for the risk-free rate in foreign currency (i.e., τB,t+1 high when interest rate is low) this could be endogeneized in model with habit preferences when the intertemporal substitution effect dominates the precautionary saving effect
  • 29. Outline Motivation Model: one risky asset Model: two risky assets Endogenous entry & time-varying risk aversion Simulation Conclusions
  • 30. Simulation (I/II) Collect all bond issuance with initial maturity of more than 1 year since 1988 for Brazil from Bloomberg (in LC and FC) and aggregate data at monthly frequency (price, quantity, and rating at issuance) Estimate Γ and Σ using data for Brazil rt return on the US t-bills, rt return on money market Brazilian rate zt = ∑ Nt k=1 Rk,t Ik,t ∑ Nt k=1 Ik,t the weighted average of ratings at the issuance (in LC and FC respectively) qt = ∑T i=0 ∑ Nt−i k=1 Ik,t−i −Mk,t−i GDPt the cumulative net issuance of bonds over GDP (in LC and FC respectively) ∆st Brazilian Real to U.S. dollar spot rate
  • 31. Simulation (I/II) 1. Simulate model for constant values of risk tolerance and grid of values for the fraction of generalists 2. Impulse responses when fraction of generalists is small and equal to 30% (i.e., average value for Brazil) and large and equal to 70% 3. Estimation of utility difference ∆u between generalists and specialists in asset B for different values of the fraction of generalists and risk tolerance 4. Feed model actual U.S. short-term interest rate after Great Recession to estimate time-varying risk tolerance of foreign investors and equilibrium fraction of generalists
  • 32. Fixed Number of Generalists (I/II) 0 0.2 0.4 0.6 0.8 1 fraction of generalists 2 2.5 3 3.5 4 4.5 mean yields (%) yA yB 0 0.2 0.4 0.6 0.8 1 fraction of generalists 0 0.2 0.4 0.6 0.8 1 1.2 Var returns (%) VarA VarB 0 0.2 0.4 0.6 0.8 1 fraction of generalists 0.045 0.05 0.055 0.06 0.065 0.07 correlation of returns 0 0.2 0.4 0.6 0.8 1 fraction of generalists 0.38 0.4 0.42 0.44 0.46 entry u
  • 33. Fixed Number of Generalists (II/II) LC bonds have larger yields and variance of returns regardless of fraction of generalists LC bonds yield declines a bit with fraction of generalists When the fraction of generalists increases, the correlation between LC and FC bond returns increases Fraction of generalists ≈ 30%
  • 34. IRFs (I/II) 0 5 10 15 20 2 4 6 8 10 12 % shock to rf us 0 5 10 15 20 -0.01 0 0.01 0.02 0.03 0.04 % shock to s yA (low fract) yA (high fract) yB (low fract) yB (high fract) 0 5 10 15 20 1 2 3 4 5 6 % shock to zB 0 5 10 15 20 0 5 10 15 20 % shock to zA
  • 35. IRFs (II/II) shock to U.S. short term rate affects more FC bond yields, and LC bond yields when fraction of generalists is large shock to exchange rate affects only LC bonds, and the more so the larger the fraction of generalists shocks to the default realization of FC bonds affects also LC bonds when fraction of generalists is large shocks to the default realization of LC bonds affects mostly LC bonds, and the more so the lower the fraction of generalists
  • 37. Entry (II/II) For a given level of risk tolerance, the benefits of becoming generalists decline with the share of generalists For a given level of the share of generalists, the benefits of becoming generalists increase with the risk tolerance
  • 38. Entry after the Great Recession
  • 39. Conclusion We build a model of partially segmented markets where foreign investors are specialized in EM bonds in FC and local investors in LC, and foreign investors can also invest in LC bonds after paying a fee - for a given fee level, benefits to foreign investors from entering the LC bond market are larger the lower their risk aversion - the sensitivity to global shocks of LC bonds is higher the larger the share of foreign investors in the market for LC bonds - when foreign investors’ risk aversion is positively correlated to U.S. short-term interest rates, the model predicts the significant increase in the share of LC bonds held by foreign investors that we observe in the data after the Great Recession The model can be used to study counterfactual scenarios, like the effect of the exit of the Fed from the low interest rate environment
  • 42. Aggregate EM Debt (in USD) 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 AssetsinUSDbillions local currency foreign currency back to motivation
  • 43. Aggregate Foreign EM Debt Holdings Shares (as % of local and foreign currency debt) 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 0 10 20 30 40 50 60 70 Assetsas%ofEMdebtinlocalandforeigncurrency local currency foreign currency back to motivation
  • 44. Aggregate Foreign EM Debt Holdings (as % of EM GDP) 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 0.5 1 1.5 2 2.5 3 3.5 Assetsas%ofEMGDP local currency foreign currency back to motivation
  • 45. Foreign Holdings of EM Government Debt Securities in Local Currency (% of total) back to motivation
  • 46. The risk free rate 2002 2004 2006 2008 2010 2012 2014 2016 2018 0 1 2 3 4 5 6 back to motivation Notes: Yield on 3-Month Treasury Bill
  • 47. Differences in default risk? mean absolute differences in credit ratings Brazil C hile C hinaC olom biaH ungary IndiaIndonesiaM alaysia M exico Peru Philippines PolandR om ania R ussia South Africa Turkey 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 Figure: This figure plots the mean absolute difference in credit ratings on debt denominated in foreign and local currency. Credit ratings are from S&P for the period 2002:3–2016:12 and are converted in a numerical ordering with AAA=1 and SD=16 simple differences in ratings .
  • 48. Local currency market negligible? local currency debt: share of total governmebt debt (2016:Q3, %) Brazil C hile C hinaC olom biaH ungary IndiaIndonesiaM alaysia M exico Peru Philippines PolandR om ania R ussia South Africa Turkey 0 10 20 30 40 50 60 70 80 90 100 Figure: Local currency debt as a share of total government debt at 2016:Q3. Data are from a sample of 16 emerging countries from Arslanalp and Tsuda (2014).
  • 49. Market integration? local currency debt: share held by foreign investors (2016:Q3,%) Brazil C hile C hinaC olom biaH ungary IndiaIndonesiaM alaysia M exico Peru Philippines PolandR om ania R ussia South Africa Turkey 0 5 10 15 20 25 30 35 Figure: Share of local currency debt held by foreign investors in 2016:Q3. Data are from a sample of 16 emerging countries from Arslanalp and Tsuda (2014).
  • 50. Simple differences in credit ratings mean differences in credit ratings Brazil C hile C hinaC olom biaH ungary IndiaIndonesiaM alaysia M exico Peru Philippines PolandR om ania R ussia South Africa Turkey 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 Figure: This figure plots the mean difference in credit ratings on debt denominated in foreign and local currency. Credit ratings are from S&P for the period 2002:3–2016:12 and are converted in a numerical ordering with AAA=1 and SD=16 back .
  • 51. Data Figure: Yields on local and foreign currency denominated government debt. Yields on local currency debt are from the J.P. Morgan GBI-Broad indices. Yields on foreign currency denominated debt are from J.P. Morgan EMBI Plus indices. Data are at monthly frequency for the period 2002:3–2016:12.
  • 52. MODEL
  • 53. Asset Pricing (Standard Model) If the LOP holds, and investors can form portfolios freely, there exists a SDF Mt+1 that prices any excess return Re,i t+1: Et Mt+1Re,i t+1 = 0 Assuming that returns and SDF are lognormal, the Euler equation implies Et (re,i t+1) = − covt (mt+1, re,i t+1) vart (mt+1) βi t vart (mt+1) λt where lower cases denote logs. If M is an excess return, its market price of risk λ should be equal to its mean as beta is equal to 1 (no-arbitrage condition). back
  • 54. Special case: Γ and Σ diagonal (single asset model) In order to get simple closed-form solutions, it is convenient to take Γ and Σ as diagonal matrices Γ =     ρr 0 0 0 0 ρz 0 0 0 0 ρq 0 0 0 0 ρ∆s     , Σ =     σ2 r 0 0 0 0 σ2 z 0 0 0 0 σ2 q 0 0 0 0 σ2 ∆s     back
  • 55. Model: a simplified framework (1 asset, 1 investor, exchange rate & default risk) Combining (6)–(??) we get expression for the excess holding period return for the foreign investor is Et [rxt+1] = interest rate risk premium τ−1 θ 1 − ρr θ σ r 2 qt + credit risk premium τ−1 1 1 − ρr θ σ z 2 qt + + 1 1 − ρr θ σ ∆s 2 qt exchange rate risk premium + τ−1 θ 1 − ρr θ σ q 2 V (1) 2 qt supply risk premium (11) back
  • 56. Solution: general case Formally, we conjecture that the long-term yields in market A and B are yA,t = αA0 + αA1xt, yB,t = αB0 + αB1xt, the demands of generalists are dA,t = δA0 + δA1xt, dB,t = δB0 + δB1xt,
  • 57. Solution: general case 3 Variances and covariance VI = ∑ J θI 1 − θI αI,J 2 σ2 J , I = {A, B, C}, J = {r , z, ∆s, qA, qB } CA,B = ∑ J θAθB (1 − θA)(1 − θB ) αC,J αB,J 2 σ2 J , J = {r , z, qA, qB } Generalists demand δA1 as a function of αA1 δA0 = τ VB (αC0 − ¯r − ¯z − ∆¯s) − CA,B (αB0 − ¯r − ¯z) VAVB − (CA,B )2 , δA1 = τ     VB 1 1−θA αC1 − er − θA 1−θA αC1 + ez + e∆s Γ −CA,B 1 1−θB αB1 − er − θB 1−θB αB1 + ez Γ     VAVB − (CA,B )2 back
  • 58. Equilibrium Selection In a similar framework, GHL show that a linear equilibrium exists only if investors are sufficiently risk-tolerant (i.e., if τ is large enough) When investors are sufficiently risk tolerant, there two types of solutions 1. yields are highly sensitive to supply shocks and bonds very risky so that investors want to be compensated with large returns (i.e., large changes in yields) 2. yields are less sensitive to supply shocks and bonds less risky, so that investors require smaller returns Following GHL, we focus on the solution that implies that yields are less sensitive to changes in their own supply it is possible to show that the first root is explosive when σ q→∞ back
  • 59. Differences with respect to GHL 1. We assume that both assets are defaultable long-term bonds 2. We introduce exchange rate risk 3. We assume that foreign investors are specialized in FC bonds, and local investors in LC bonds 4. We assume that generalist investors invest in both markets 5. We introduce endogenous entry in the pool of generalists 6. We assume that foreign investors have time-varying risk aversion tied to the risk-less U.S. short-term interest rate back
  • 60. Table: Foreign holdings shares Min Max Mean Min Max Mean foreign currency (%) local currency (%) Brazil 5.36 30.75 16.80 0.99 20.27 8.36 Chile 85.50 100.00 99.32 3.14 8.86 5.75 China 0.09 2.09 0.90 0.00 3.18 0.57 Colombia 46.02 65.47 51.04 4.46 22.27 8.37 Hungary 38.95 72.70 53.55 21.04 43.65 30.08 India 0.00 0.01 0.00 0.12 4.03 1.23 Indonesia 1.16 40.79 13.52 1.63 39.63 19.96 Malaysia 0.00 41.24 21.31 12.37 37.34 24.49 Mexico 57.99 100.00 100.00 4.36 37.99 18.50 Peru 16.39 60.71 28.99 0.00 56.61 27.61 Philippines 40.22 100.00 61.14 0.00 14.63 5.16 Poland 32.65 64.11 51.48 13.33 41.89 25.38 Romania 11.94 40.41 27.52 5.40 22.38 15.89 Russia 10.49 38.00 24.11 0.12 23.12 6.42 South Africa 23.14 40.72 30.97 6.54 38.01 18.97 Turkey 17.79 58.91 34.44 5.08 24.48 13.34 back
  • 61. A Model with Partially Segmented Markets (2 assets, 3 investors, exchange rate & default risk) Formally, we say that markets are integrated if a conditional CAPM model prices both assets Et [rxt+1] = τ−1 B Vart [rxt+1]st = βt [rxt+1, rxM,t+1]Et [rxM,t+1], where rxM,t+1 = strxt+1 is the market portfolio. In our framework, for each asset rxi,t+1 − Et [rxi,t+1] = φ t+1 where φ = φA φB contains the factor loadings of each asset on the factor innovations. If 1 − nA − nB = 1, then Et [rxt+1] = τ−1 Vart [rxt+1]st = φ τ−1 Σφ st λt
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