1. return objective, 就是real purchasing power after meet spending needs/distribution 2. Calculate rate, 就是你那个9.82 或9.55 3. Liquidity: 0.055*total fund 4. Time Horizon: Long term, single stage 5. Donation and Inflation 对Ability to take risk 的影响,Donation 越多,ability 越高,Inflation 越高,Ability 越低。