But when bonds are purchased between interest dates, the purchaser pays the market price for the bond plus the interest accrued since the last interest payment date.

当债券在付息日之间购入时，购买人支付的价格是债券的市价加上自上一个付息日起应计的利息。

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When the date came, you would cut the coupon off and go to the bank and get your interest payment.

到息日到了以后，你就可以剪下这张息票拿到银行,去兑换利息。

耶鲁公开课 - 金融市场课程节选

Using their KnowEquity When calculator, you can plug in your initial loan amount, the term and interest rate, first payment date, home value, and expected rate of price appreciation, and extra monthly payments to predict when your equity will finally equal your loan balance.

FORBES: Underwater Mortgage Calculators: When and How Will You Get Back to Even?