A new 50-year mortgage proposal is stirring the U.S. housing market and sending ripples through global equities. Long-term debt, slower capital build-up and sector-shifting risks are now in focus for investors.

United States Case Shiller Home Price Index (1M)

What the proposal means and why it comes now

After years of extreme home price growth, which has increased by more than 40% since the pandemic according to Case-Shiller Index data, the U.S. population is facing a housing affordability crisis. The average 30-year mortgage rate is hovering around 6-7% in 2025, the highest in two decades. This is despite the fact that the US Federal Reserve has already cut interest rates twice this year. The main idea behind Trump's proposal is to put lower-income households in a better position to buy a new house.

From a political marketing perspective, this is a smart move. It lowers the monthly payment and gives the illusion of greater affordability. But from an economic perspective, it extends the…