A global bond selloff has pushed MBS yields to new yearly highs, with the 30-year Treasury touching levels unseen since 2007 — a jarring rate shock that arrives just as the shelter inflation picture was finally beginning to clarify.

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RATES: A Technical Breakdown With Global Footprints

The rate environment deteriorated sharply at the end of last week, and the catalyst was as much geopolitical as economic. As Lawler (via McBride's Calculated Risk) details, the current coupon MBS yield hit a new yearly high, driven by a cascade that started in overseas markets before spilling into Treasuries. The 30-year Treasury yield reached its highest level since July 2007, while 30-year UK and Japanese government bond yields simultaneously hit their highest points since the late 1990s — a synchronized global repricing that underscores how interconnected the pressure is.

The proximate triggers were multiple: hot inflation readings, above-expectation economic data, rising oil prices, and deepening fiscal concerns had already been nudging rates higher through early May. Then Friday's spike arrived on top of all that, triggered by disappointment from the Trump/Xi talks, which many market participants had priced as likely to ease Iranian conflict tensions and push oil lower — instead, oil jumped. Lawler quotes Treasury technical analyst Linda Richman on the 10-year breaking what had been assumed to be major support at 4.50%: it cut through "like a hot knife through buttah."

On spreads, CCMBS/Treasury spreads widened modestly — notable more for what didn't happen than what did. Given the sharp spike in actual and implied rate volatility, spreads held in better than expected, suggesting the MBS market isn't in distress, just expensive.

For housing, the implication is direct: mortgage rates are moving higher, driven by forces almost entirely outside the domestic housing market's control.

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SHELTER INFLATION: Past the Peak, But Which Way Now?

Erdmann's April tracker offers a measured counterpoint to the bond panic. He's in "wait-and-see mode" — deliberately so. Core CPI less shelter continues to track along the 2% growth path, which is the right signal to isolate: the Federal Reserve's inflation problem has always been partially a shelter lag story, and that chapter may be closing. Erdmann's framing is precise — shelter inflation is "permanently past its elevated period," but the live question is whether it's now drifting neutral or beginning to correct downward (which would be deflationary on shelter, a tailwind for affordability).

The complication, which Erdmann acknowledges directly, is Trump-driven policy noise. The inflation indexes that include energy saw a big bump this month, muddying the read. Disentangling genuine shelter disinflation from energy-driven headline effects — all against a backdrop of tariff uncertainty — makes it genuinely difficult to call the trend right now. Hence the wait.

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Synthesis

The two signals from this cycle point in tension: Erdmann's tracker suggests the shelter inflation story could resolve favorably for housing affordability over the medium term, while Lawler's bond market read makes clear that the near-term rate environment just got more hostile. A global bond repricing — driven by geopolitics, fiscal anxiety, and dashed hopes from U.S.-China talks — is not something housing data can offset in the short run. Buyers facing rate quotes priced off a 30-year Treasury at 2007 highs will feel that before any shelter CPI improvement shows up in their monthly payment.

The next few weeks of data — particularly whether MBS spreads hold or widen further — will matter as much as any housing-specific release.

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TL;DR - Rates shock: The 30-year Treasury hit its highest level since July 2007 after a global bond selloff; MBS yields set a new yearly high, directly pressuring mortgage rates upward. - Spreads resilient (so far): CCMBS/Treasury spreads widened only modestly despite the volatility spike, meaning the MBS market is repricing with the broader rate move rather than breaking down independently. - Shelter inflation at an inflection: Erdmann's tracker shows core CPI ex-shelter holding near 2%, with shelter inflation past its peak — but policy chaos and an energy spike are making the directional call genuinely murky.

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Compiled from 2 sources · 2 items

• Bill McBride (1)
• Kevin Erdmann (1)