That happened when Lehman Brothers failed in September 2008. The Reserve Fund, a well-established money-market fund with too many unpaid IOUs from Lehman, could not keep its value steady.
这种情况在2008年9月雷曼兄弟破产时就出现了。“储备基金”这家持有过多未支付雷曼兄弟金融要求权的老牌货币市场无法维持自身价值稳定，出现了跌破面值的状况。