The strawberries remind me of the pricing of long-term bonds. Let’s say newly issued 100yr Treasuries pay a 1% coupon today, but tomorrow the coupon will be 2%

The strawberries remind me of the pricing of long-term bonds. Let’s say newly issued 100yr Treasuries pay a 1% coupon today, but tomorrow the coupon will be 2%, how much does the price of the older bond change? The answer is a near 50% loss, simply because this is required to bump the yield of the older bond to 2%. (If we include the discounted principal payment the exact answer becomes a 41.3% loss)