House with Danish flag flying in the sunlight, while next door, a house with an American flag is being rained on
Millions of Americans are trapped in their homes thanks to rising mortgage rates. But a genius rule lets Danish homeowners dodge the lock-in effect.

The typical home loan in America is a gift. It's also a trap.

Most US homeowners have loans that guarantee they'll pay the same amount each month for decades, regardless of inflation or the shifting winds of the economy. These are called 30-year fixed-rate mortgages, and they offer rare bright spots of certainty in the housing market's endless cycle of booms and busts. Lock in a favorable rate, and you're on the steady track to prosperity.