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Computational Finance 2004 Artificial Agents and Speculative Bubbles Y. Semet , S. Gelly, M. Schoenauer, M. Sebag Optimization & Machine Learning Group INRIA Futurs Orsay, France
Roadmap ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Background ,[object Object],[object Object],[object Object]
Previous Works ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Our market ,[object Object],[object Object],[object Object],[object Object]
Auction Algorithm
ZI-Agents, Exogenous Risk ,[object Object],[object Object],[object Object]
Evaluating Risk Endogenously ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Choosing a strategy… 1 1 1 Buy Idle Sell 0 Exuberance Buy Idle Sell 0 Comfort Buy Idle Sell 0 Panic Exuberance Comfort Panic  R 0 R 0 0 1 r(i,t)
Making an offer ,[object Object],[object Object],[object Object]
A glimpse on the GUI ,[object Object],[object Object],[object Object],[object Object]
Experiments ,[object Object],[object Object],[object Object],[object Object],[object Object]
Linear risk ; Time horizon=500 p(t) Buy & Sell r(t)
Endogenous risk: default behavior (efficiency) p(t) r(t) Buy & Sell Exuberance Comfort Panic
At t=250, F becomes 75 p(t) r(t) Buy & Sell Exuberance Comfort Panic
Bubbles w/o krach ; R0 in [0.4;0.6] p(t) Close-up Buy & Sell Exuberance Comfort Panic
Bubbles w/o krach ; R0 in [0.4;0.8] p(t) Buy & Sell Exuberance Comfort Panic
Influence of fool factor 1.05 1.1 1.2 1.0
Introducing asymetry p t-1 -5% in panic vs p t-1  +/- 1% comfort/exb.  bubbly behavior (R0 in [0.4;0.6]) p(t) Close-up Buy & Sell Exuberance Comfort Panic
Bubbly behavior (R0 in [0.4;0.8]) p(t) Close-up Buy & Sell Exuberance Comfort Panic
Conclusions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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