This couple took out an adjustable-rate mortgage when rates were over 8%. Here’s how it worked out.

Adjustable-rate mortgages are regaining popularity as borrowing costs remain elevated. Unlike fixed-rate loans, ARMs offer a lower introductory rate for a set period, after which the rate adjusts periodically based on market conditions. For buyers facing affordability constraints, that initial discount can make monthly payments more manageable in the near term.

The trade-off is uncertainty. Once the fixed period ends, payments can rise—sometimes sharply—depending on where rates stand at the time of adjustment. The experience of borrowers who took out ARMs when rates exceeded 8% illustrates both the potential relief and the risk involved: a lower starting payment can help, but it does not eliminate exposure to future rate changes.

For market observers, the renewed appeal of ARMs is a signal worth watching. It suggests buyers are stretching to afford homes and may indicate where affordability pressure is most acute. It also matters for lenders and investors, since ARM volumes can shift the mix of mortgage credit risk. The key variable ahead is the path of interest rates when these loans begin to reset.