JPMorgan: President Trump's $200bn MBS Tweet Sharply Changed Mortgage Market Tone
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A presidential tweet regarding USD 200 billion in mortgage-backed security (MBS) purchases dramatically shifted market tone Thursday afternoon, with belly and lower-coupon MBS tightening approximately 8 basis points in after-hours trading. FHFA Director Pulte confirmed government-sponsored enterprises (GSEs) will execute the purchases.
JPMorgan views this policy intervention as a potential opportunity for investors to sell into strength, given that fundamental valuations were already tight. Historical precedent, such as the QE3 announcement in 2012, suggests spreads could initially tighten further before reversing by 40 basis points. The GSEs will likely need to phase these purchases to ensure medium-term durability or demonstrate willingness to expand beyond the stated scale.
The GSEs hold sufficient non-MBS assets, such as cash equivalents and Treasuries, to fund the majority of purchases, though debt issuance may be necessary to maintain liquidity buffers. Purchasing Ginnie Mae securities is permissible and would support affordability-challenged borrowers, though concentrating on belly coupons conflicts with GSE profitability objectives.
Historically, GSEs hedge MBS acquisitions using swaps and swaptions, meaning their market impact on broader yields and volatility remains smaller than Federal Reserve operations. JPMorgan's core recommendation is to sell belly coupons into this tightening momentum.