break the buck

基本解释

But if investors demanded their money back at a time when Treasury bills were illiquid, money-market funds might be forced to suspend resumptions or "break the buck".
但投资者如果在国库债券流动性不足的时候要求收回他们的钱银，那么货币市场基金可能会被迫暂停货币回笼或“跌破票面价值”。
Saying there's no chance for problems is not accurate." The danger: A fund could suffer losses on its holdings and "break the buck" - see the value of a share fall below $1.
危险是，一只基金在持有期间可能承受损失，并且会跌破净值。
Reserve Primary, an independent money market fund, held Lehman paper and, since it had no deep pocket to turn to, it had to “break the buck” – stop redeeming its shares at par.
独立货币市场基金Reserve Primary持有雷曼票据，因没有资金雄厚的机构可以求助，该基金不得不“跌破1美元”——停止按面值赎回其股票。

No one can predict what will cause the next crisis, or what will cause the next money market fund to break the buck.
FORBES: Move up http://i.forbesimg.com t Move down
It had to break the buck when Lehman failed.
FORBES: Money Market Fund Reforms Remains Elusive
In fact, if you wouldn't mind, do us a favor and share your findings in the comments section after the break -- we have quite a few bookworms on staff who wouldn't mind saving a buck or two.
ENGADGET