按照日期为每叠票据排序。
我所选择的日期是过去日期，这表明我不希望为请求的票据指定一个失效时间。
The date that I have chosen lies in the past, which indicates that I don't want to specify an expiry time for the ticket being requested.
指浮动利率票据支付上一次息票的日期，而且是这些票据下一次息票开始计息的日期。
The date on which FRNs pay their previous coupon and from which they start to accrue interest on their next coupon. This will often be used as a flat settlement date.
指浮动利率票据支付上一次息票的日期，而且是这些票据下一次息票开始计息的日期。
The date on which FRNs pay their previous coupon and from which they start to accrue interest on their next coupon. This will often be used as a flat settlement date.
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