Higher rates may last longer: criteria for bonds, dividend stocks and gold | Cho Won-kyung, Sejong University professor [Conversation with the Experts]

An independent exercise, not a statement by the video creator or verification of every claim in the video.

A maturity payment is not all income

Using the same arbitrary monetary unit throughout, suppose a hypothetical portfolio invests 100 in each of 4 bonds, for total principal of 400. Assume purchase at par, a fixed annual 5% coupon paid at year-end, initial maturities of 1, 3, 5 and 7 years, and payment as promised. At the end of the first year, cash receipts are 20 in interest plus 100 in maturing principal, totaling 120. Only 20 is earned interest; the 100 is an existing asset returned. Spending the entire 120 on living costs without reinvestment leaves bond principal of 300, reduces second-year interest to 15 and leaves no maturing principal that year. Track interest, returned principal, spending and reinvestment separately on a maturity schedule. Staggering maturities designs cash-flow timing; consuming principal does not preserve the same interest income indefinitely.

Check for yourself

1. How much of the maturity payment is newly earned interest and how much is returned principal?
2. What cash will cover living costs in years without a maturity?
3. How does next-year interest differ when returned principal is spent versus reinvested?

Limits of application

This is a hypothetical calculation, not a real product or return forecast. Purchase prices equal face values, with no default, early redemption, taxes, fees, exchange-rate movements or inflation. Reinvestment rates are uncertain, and early-sale prices can differ from principal. Do not apply individual bond maturities as a promise of principal repayment by a conventional bond fund.