As borrowers' debt comes due, rising interest rates will cause defaults and sales.
Defaults could cascade through the financial system, putting "trillions" of dollars at risk.
After nearly 15 years of rock-bottom interest rates, financial markets — including real estate — are being weaned from easy money by Federal Reserve rate hikes, Benjamin Miller, the CEO, said.
Suddenly, landlords might be on the hook for 20% or more of the total value of the property, and their interest rates will be at least double what they were.
An even bigger risk to the financial system lies with interest-rate derivatives, or financial contracts used to mimic or bet against rate moves.