Housing as a financial decision

When you take out a fixed-rate mortgage, you don't only buy a house — you buy a 30-year loan locked at today's rate. If rates rise after you borrow, that loan becomes an asset: you owe money at below-market terms, which is the same as having a small bond paying you the rate difference forever. Most household-finance advice ignores this entirely.

Because the decision to sell or refinance is usually framed as comparing house prices and not loans. In a high-rate environment, your low-rate mortgage may be worth $50–100k more than zero. Walking away from it — to chase a slightly cheaper house, to "rightsize," to relocate — frequently destroys that value silently.

Rates rose since you bought

your loan is winning

Rates fell ≥1pp

evaluate refi

Rates fell ≥1.5pp

refi

Life event (job, family)

decide on life, not rates