Based on the principles of micro-economics,focusing on categorizing types of toll at the goal of toll,researching on the highway toll-rates determining models under the toll-rates of crowd levy,repayable levy,and for-profit levy,comparing and analyzing quantitatively on a variety of theories of highway tolls,it provides theoretical basis for solving urban road construction and tolls.

On the conditions of investment restrain,portfolio investment models of hosing accumulation fund and a dynamic portfolio investment model of hosing accumulation fund that consider return of loan commitments with VaR measure are established.