Description: When people retire, purchasing the annuity insurances using their retirement fund is one way against the longevity risk. However, it has some shortcoming- the annual payment may be insufficient for daily life consumption and can’t be adjusted for any urgent need [liquidity risk]. This is the abstract of a paper that investigates the adequate annuitization timing and optimal asset allocation under different investment strategies that can be found according to a time-series of safety level as a utility function for a retiree.