A "perfect financial storm" more severe than 2008 is brewing? 'Dr. Doom' warns: $8.3 trillion in low-interest mortgages have already suffered $2 trillion in paper losses.

According to the Zhihu Finance APP, Peter Schiff, a famous American economist known as "Dr. Doom," believes that the low mortgage rates locked in years ago may have been one of the wisest financial decisions you ever made, but they could also become part of the "perfect storm for imminent financial destruction." In a post published on X on October 15, Schiff warned: "In the brewing mortgage crisis, the losses for mortgage holders will far exceed those suffered during the entire Global Financial Crisis (GFC)."

He claimed: "Even without a single default, mortgage holders have already lost more than four times what they lost during the Global Financial Crisis, on paper."

He attributes this situation to the Federal Reserve's long-term maintenance of low interest rates and government-backed mortgages that allowed borrowers to lock in cheap financing for decades. "This sowed the seeds," he wrote.

If most of your wealth is tied up in real estate or if you're counting on your portfolio to see you through retirement, this is a sobering prediction.

However, before you start imagining another foreclosure crisis, there is an important distinction: a mortgage losing value to investors does not automatically mean your house is losing value, your monthly payments will rise, or your lender will go bankrupt. Also, remember that if your loan or its servicing rights change hands, the new company still cannot arbitrarily alter your contract terms.

Why Schiff Sees Trouble in Low-Rate Mortgages

Schiff wrote: "Currently, there are about $8.3 trillion in fixed-rate mortgages outstanding, with an average interest rate of 4.6% and a remaining term of 25 years. Given the current rate of 7.5%, the mark-to-market losses on these mortgages are about $2 trillion. If rates rise to 8.5%, losses will reach $3 trillion!"

For comparison, Schiff put the actual losses from defaulted mortgages between 2007 and 2010 at around $450 billion. Please note, these are Schiff’s estimates, and his scenario of 8.5% is not today’s reality. Freddie Mac’s latest survey released on October 15 showed the average rate for a 30-year fixed mortgage at 7.40%, up from 6.27% a year ago.

The basic pricing issue is: if a newly issued mortgage carries a much higher interest rate, investors typically won’t pay full price for an older loan with similar terms but a much lower coupon. That old mortgage needs to be discounted to remain competitive. This decline in market value is what Schiff refers to as mark-to-market loss. Homeowners may still be making timely and full payments.

Mark-to-Market Losses Are Not the Same as Mortgage Defaults

Schiff juxtaposes two very different types of losses: one is actual capital loss caused by borrower default, the other is a decline in the potential resale price of a performing mortgage when it is sold.

A mortgage can lose resale value even if the homeowner keeps making payments. This hurts the holder of the loan, but it is not the same as borrower default.

Who holds the loan is key. Mortgages are often sold and packaged into securities, and their investors are repaid by pools of borrowers. So, the institution that originated your mortgage might not be the one assuming the investment risk later on.