有价债券 meaning in English

documentary securities

Ikb deutsche industriebank had put money into american debt securities , including some based on subprime loans . some of those loans started to fail
Ikb德国已经把钱投入到美国有价债券之中了，包括一些以优次贷款为基础的债权。其中的一些贷款开始跌落了。
The snag is that sterilisation is expensive because the rbi has to pay much more on the bonds it issues to mop up liquidity than it earns on dollar reserves
问题是这种遏制代价昂贵，印度储备银行rbi为消除流通增长而发行的有价债券，其利息远大于美元储备的收入。