For instance, it poses fewer risks if it is concentrated mainly among the relatively wealthy households. In this regard, it is equally important to understand how households choose their portfolios: the risks stemming from the household sector will depend largely on how household  BIS Review 141/2010  3  portfolios are structured. Household portfolios are prone to all sorts of biases.
The purpose of the SAA is to maximize returns for each tranche, while being subject to a very low probability of capital loss over a given investment horizon.