But whereas protection against natural catastrophes tends to be offered for a year or two,longevity bonds are only useful over longer periodsenough time needs to pass for pastprojections to have been proved wrong. This does not suit the average investor, particularly inthe absence of a liquid secondary market. So far, only a tiny fraction of the 23 trillion inliabilities in private defined-benefit plans have been protected. Whoever hits on the rightformula will do a brisk trade.
但是鉴于防范自然灾害往往是限于一至两年,而长寿债券只是在长时间见内有用需要足够的时间来验证过去预测正确与否。这并不适合普通的投资者,特别是在缺乏流动性的二级市场。到目前为止,只有二十三万亿美元这一小部分的私人养老金固定收益债务得到了保护。任何想到正确方案的人都将能够生意兴隆。
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