In bonds, spot rates consult with the interest rates prevailing at a particular issue in time when managing zero-coupon bonds. Zero-coupon bonds are fastened-interest securities that don't make periodic interest payments (or coupons) to their holders, alternatively promoting at a discount to their deal with price and maturing at par. https://edgarwktdm.canariblogs.com/a-review-of-investment-grade-53252918