prime mortgage rate的意思|示意

For example, the Fed has proposed limits on how much mortgage interest rates can exceed the prime rate for low-income borrowers with poor credit ratings.

例如，美联储曾提议将低信用评级的低收入的贷款者的按揭利率超出最优惠利率的范围做一个限制。

Financial stocks also slumped on interest rate fears and renewed concerns over the repercussions of the us sub-prime mortgage crisis.

息口忧虑浮现，加上市场关注美国次级按揭危机扩散，金融股亦见下挫。