What this market video covers
A bond coupon payment can be smaller than the issuer's interest expense. Consider a hypothetical annual payment bond with one thousand dollars of face value and a five percent coupon. It was issued at a discount. Assume its beginning amortized cost is nine hundred dollars and its original annual effective interest rate is six percent. Cash interest is five percent of face value, or fifty dollars. Effective interest expense is six percent of the nine hundred dollar beginning carrying amount, or fifty four dollars. The four dollar difference amortizes part of the discount. After paying the coupon, carrying amount becomes nine hundred four dollars. This is the issuer's simplified effective interest accounting, with no fees, impairment or other adjustments. The original effective rate is not replaced each period by a new market yield. Carrying amount is not today's trading quote. Read the accounting basis before equating coupon cash with total interest expense. Hypothetical worked example; stated assumptions apply. Educational content, not personalized investment advice.
Use this analysis as general education. Confirm current prices and conditions independently, define invalidation before entry, and size every position for the loss you can actually tolerate.