償債基本
sinking fund
一種償債安排。允許債券發行人提前購回一定比例的債券，購回的方式可以是在公開市場上，也可以是在按照償債基金條款所約定的贖回價格購回。
One kind of debt arrangements. Allow issuers to buy back a certain percentage of the advance bond repurchase way may be on the open market, it can be a sinking fund in accordance with the terms stipulated redemption price of repurchase.