金融财经英语表达：break the buck

会计考友

　　AAA, an independent money market fund, held BBB investment bank paper and, since it had no deep pocket to turn to, it had to “break the buck” – stop redeeming its shares at par.
: [, K4 y' j+ M: }　　独立货币市场基金AAA持有BBB投资银行票据，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。