They could borrow at an interest rate only a bit over the Treasury rate and then accumulate large portfolios of mortgages and mortgage-backed securities earning the market rate.

它们能够以仅比国债利率高出那么一丁点的利息借钱，然后积累大量住房抵押贷款和住房抵押贷款债券，凭借市场利率赚钱。

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They could borrow at an interest rate only a bit over the Treasury rate and then accumulate large portfolios of mortgages and mortgage-backed securities earning the market rate.

它们能够以仅比国债利率高出那么一丁点的利息借钱，然后积累大量住房抵押贷款和住房抵押贷款债券，凭借市场利率赚钱。

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