This is what I was referring to - I've read interest rates influence Investment Yield - often in opposite directions.
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"Regardless of whether a bond is issued by a government or a corporation, the mechanics of bond pricing are the same. Bonds are issued at a specific rate of interest that the issuer will pay to investors, known as the coupon. Once issued,
the coupon never changes – but prevailing interest rates can. When that happens, an existing bond’s coupon rate may become more or less attractive by comparison, and that affects its price.
- When an existing bond has a higher coupon than a newly issued bond, it pays out more income. Investors may be willing to pay more to own it, driving its market price up.
- Conversely, when an existing bond has a lower coupon than current rates, investors may find it less appealing, and its market price may go down.
The relationship between a bond’s
current price and its coupon is known as its yield, which is the amount of return an investor will realize on a bond, calculated by dividing its face value by its coupon. As market conditions affect a bond’s price, its yield will also change. "