Modern financial functional viewpoint theory explains the limitations of financial market in dealing with systematic risk,liquidity assaulting and financial product pricing mechanism through comparing the risk allocation mechaims of fianncial market with that of financial intermediation.

The risk-collocation function of SIF for the whole stock market realized by vibration-reducing mechanism, balancing mechanism and sharing mechanism, and wealth will be redistribution between stock market and SIF market after choice of index-related product.

This paper first proposes a definition for equipment risk,and then formulates a cost-based equipment risk allocation optimization model.

Based on the life cycle risk analysis principle of construction project,this paper researches the risk allocation problems between government client and agent in decision making stage,operation stage (design,construction stage) and usage stage of agent construction institution.

Moreover, the risk allocation in fixed price contract is analyzed, and the difference between fixed price contract and unit price contract is identified.