Executive Summary
Morgan Stanley's securitized products team reports the Trump administration's $200 billion GSE mortgage purchase program triggered an immediate 15 basis point rally in mortgage spreads, pushing headline rates below 6% for the first time since 2022. However, the initial move appears fully priced in. The incremental $100 billion above expected GSE purchases represents meaningful flow relative to $175 billion projected mortgage market growth, but remains small against the $10 trillion total market. Jay Bakow notes this buying volume exceeds net issuance and matches Fed balance sheet runoff magnitude. The 15bp spread tightening achieved their 2026 bull case target, lowering their mortgage rate forecast from 5.75% to 5.6%. Jim Egan emphasizes the housing impact remains modest - existing home sales forecasts increase marginally from 4.23 million to 4.25-4.3 million, with home price growth unchanged at 2%. Critical unknowns include purchase pace, outright versus hedged buying, and funding mechanisms. The team identifies securitized credit and non-QM mortgages as secondary beneficiaries through portfolio effects. Additional policy tools exist but face implementation constraints - loan level pricing adjustments could provide 10-15bp benefit, while mortgage portability/assumability would require complex retroactive application. The analysis suggests further spread compression requires either front-loaded purchases, program expansion, or Fed balance sheet composition changes.
Key Insights
what The Hosts said“The mortgage market round numbers is a $10 trillion market. So in the scope of the size of the market, it's not huge. However, we're only forecasting about $175 billion of growth in the mortgage market this year. So this is the GSEs buying more than net issuance.”
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