How Policymakers Can Lower Mortgage Costs and Increase Housing Affordability

Ever since the pandemic – when surging housing demand collided with a decade of underbuilding – housing affordability has become an increasingly important political issue and a larger focus for policymakers. President Donald Trump has made it a component of his agenda heading into the midterm elections in November, including issuing several executive orders on housing (read them here), and Congress has recently taken steps to pass legislation that, among other things, would reduce the federal regulatory burden on new home construction, though much of the red tape exists at the local level.

While we believe housing affordability has improved and will continue to do so (read our recent commentary), some policy ideas circulating in Washington, DC could marginally enhance affordability, while others, albeit well-intentioned, could actually hinder affordability. We enumerate and expand on these concepts:

1) Changing the mix of agency mortgage-backed security (MBS) purchases and increasing the $200 billion amount could help lower mortgage rates. In January, President Donald Trump announced that Fannie Mae and Freddie Mac – government-sponsored entities (GSEs) – would purchase up to $200 billion of agency MBS in the coming months. The goal is to increase demand, which typically raises bond prices and lowers yields, thereby reducing mortgage rates.

Mortgage rates initially declined following the announcement – the 30-year mortgage rate fell below 6% for the first time in more than three years. However, rates have since rebounded amid the Iranian conflict as well as due to confusion about the GSE purchase program’s objectives and which mortgages the GSEs are purchasing. There has also been concern that $200 billion is too small relative to the roughly $9 trillion agency MBS market to materially impact rates.

To maximize effectiveness, we believe Fannie and Freddie should concentrate purchases in segments where rate impacts would be most significant (the so-called “par coupon”). Additionally, we think the Trump administration should consider expanding purchases beyond $200 billion – indeed, even announcing an increase could lower rates. Lastly, while the Federal Reserve should remain independent, mortgage rates could decrease further if the Fed halted the roll-off of mortgage bonds on its balance sheet (read more in our commentary “A Fed Housing Fix That’s Hiding in Plain Sight").

We believe the GSEs buying the par coupon and the Fed stopping the run-off could decrease mortgage rates up to 25 basis points (bps), with further rate declines possible if GSE MBS purchases were to increase. These policies have the added benefit of not requiring Congressional approval.