Management of risk in financial services involves various strategies. The three main strategies used to manage bond portfolios are: 1) Passive or "buy and hold" strategy which involves minimal trading of bonds held to maturity. 2) Index matching or "quasi-passive" strategy which aims to replicate the performance of a bond market index. 3) Immunization or "quasi-active" strategy which aims to minimize risk from interest rate fluctuations by matching the duration of bonds held to the duration of liabilities.