如果利率下跌时，银行虽然得到期权费，但是却失去了一些潜在利益。
If interest rates rise, the option cushions portfolio loss as the bank receives the option premium.
在利率上升(或者房价下跌)时，住房抵押债券折价销售，这对债券持有人大有裨益。
This is useful if a rise in interest rates (or a fall in house prices) causes mortgage-backed bonds to trade at a discount.
固定利率的有价证券，习惯上以为会在证券下跌时表现尚佳的它，这次却么有爆发它的小宇宙，但是班福特预计她们会很快反弹。
Fixed-interest securities, which traditionally do well when stock markets fall, HAs failed to ignite the time round, but Bamford reckons them will bounce soon.
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