John Hancock Mortgage-Backed Securities ETF Q1 2026 Commentary

John Hancock Mortgage-Backed Securities ETF underperformed the Bloomberg U.S. MBS Index in the first quarter as March bond yields surged and prices fell. Escalating Middle East conflict and renewed inflation concerns shifted expectations toward a possible Fed rate increase before year-end, pressuring MBS and broader rate-sensitive fixed income markets.

Analysis

The key read-through is not just duration pain; it is a regime shift in the funding curve that can outlast the headline shock. When rates repriced on geopolitical inflation risk, mortgage assets lost their usual ballast from convexity hedging and prepayment optionality, making agency MBS behave more like a long-rate expression than a carry trade. That tends to hurt levered mortgage REITs and MBS-heavy allocators twice: first through mark-to-market losses, then through higher repo haircuts if volatility persists.

The second-order beneficiary is the Treasury market relative to MBS, not because duration is suddenly attractive, but because MBS spreads often widen when volatility rises and mortgage investors de-risk. That creates a technical overhang for originators and housing-sensitive equities if primary mortgage rates stay elevated for several weeks, since affordability shocks hit transaction volumes with a lag. The more important catalyst is whether inflation expectations keep drifting higher for another 1-2 CPI prints; if they do, the market can continue to pull forward rate hikes even without stronger growth.

The contrarian angle is that this may be a transitory war-premium move rather than a durable inflation regime change. If commodity prices stabilize and the Fed communicates patience, MBS could outperform on spread tightening as investors rebuild carry positions into quarter-end. The risk/reward improves for buyers only after volatility compresses; chasing weakness here is less attractive than waiting for forced seller exhaustion or a clear reversal in rate vol.

For portfolios, the biggest hidden risk is not just MBS underperformance but a broader tightening in financial conditions through mortgages, which can cool housing turnover and credit creation faster than the Fed intends. That would eventually help the disinflation case, but only after several months of soft data. Until then, the market is likely to punish balance-sheet-intensive spread products before macro confirmation arrives.

Key Decisions for Investors

• Short MBB or AGG vs TLT via a 1-3 month relative-value pair: MBS should underperform Treasuries while rate volatility stays elevated; target 1.5-2.5% relative spread move with tight stop if geopolitical risk fades.
• Reduce exposure to levered mortgage REITs such as NLY, AGNC, and RITM over the next 2-6 weeks; rising yields and repo volatility can compress book values faster than dividend yields compensate.
• For tactical hedging, buy payer swaptions or Treasury put spreads on the front end for the next CPI/FOMC window; asymmetric payoff if the market keeps pricing in an earlier hike.
• Wait for a capitulation day in agency MBS before adding risk: look for a 15-25 bp spread blowout and a drop in rate volatility before initiating long MBB/VMBS trades for a 2-4 month mean reversion.
• Avoid adding housing-beta equities until mortgage rates stabilize for at least two weekly prints; if primary rates remain sticky, builders and brokers can see volume downgrades lagging the initial bond selloff.