September 2026 FOMC reaction and US monetary-policy outlook: Morgan Stanley sees two more Fed hikes after a hawkish September FOMC meeting

Overview

This cross-asset reaction report interprets the September 2026 FOMC meeting as more hawkish than the headline dot plot alone. Morgan Stanley raises its Fed forecast to two further hikes and traces the implications for rates, inflation markets, foreign exchange, Agency MBS and municipal bonds.

Core views

The Fed raised its policy rate by 25bp to 3.75%-4.00%, a move Morgan Stanley says was widely anticipated after the August inflation data. The institution now expects two additional 25bp hikes, in December 2026 and March 2027, for a terminal target range of 4.25%-4.50%, and expects that rate to remain in place through 2027 before inflation progress permits normalization in 2028. This is a revision from its pre-meeting expectation of 50bp of cumulative tightening in September and December; the updated path totals 75bp, adding a third 25bp hike. Morgan Stanley's central argument is that the meeting communication signaled more tightening than the median dot plot. The median participant projected one further hike in 2026 and then a hold next year, but 8 of 18 participants projected an additional 2027 hike. Chair Warsh described the September action twice as removing “a dose of accommodation” and said broad financial conditions were difficult to call restrictive. Morgan Stanley interprets that language as evidence that policymakers believe more restriction is required, even though Warsh later said the neutral rate was not operationally decisive for current decisions. Geopolitics and commodity-price transmission are the second pillar of the forecast. Warsh identified geopolitics as a major change since July and linked global hot spots not only to energy prices but also to commodity-processing margins and prices faced by consumers. Morgan Stanley argues that an unresolved Middle East conflict and elevated oil prices would keep inflation risk high and support continued tightening. It also notes the reverse condition: conflict de-escalation or lower oil prices could reduce inflation prints and justify fewer hikes. The third signal is the increase in the longer-run neutral-rate estimate to 3.25% from 3.06%. Morgan Stanley views the roughly half-of-a-25bp upward revision as implying that any given nominal policy rate is less restrictive than previously thought, reinforcing the case for two additional hikes rather than one. The firm nevertheless expects a quarterly pace of decisions, with hikes in December and March, rather than action at every meeting. It cannot rule out an October hike, especially because markets were pricing more than a 50% probability, but judges patience more likely. Conversely, faster disinflation, Middle East de-escalation, or an over-interpretation of Warsh’s wording could leave only a December hike or no hikes beyond it. For rates, Morgan Stanley expects markets to raise the near-term probability of additional hikes while assigning lower probability to sustained tightening further into 2027 because inflation trends can change over a longer horizon. It sees more hike-risk premium in the second half of 2027 and recommends entering an SFRZ6Z7 flattener at +40bp, targeting +10bp with an initial +50bp stop; the trade is intended to capture a front-loaded hiking cycle and associated medium-term growth downside. It also recommends maintaining long 2-year September 2027 UST-SOFR swap spreads at -1.4bp, targeting +1bp with a trailing -5bp stop, and maintaining long 1y1y versus short 5y5y CPI swap forwards at 8bp, targeting 25bp with a 0bp stop. The latter reflects the view that commodity-price pass-through can lift near-term inflation while Fed credibility contains longer-dated inflation expectations. In foreign exchange, the report sees the meeting as supportive of a stronger US dollar, particularly against the yen, because further near-term curve flattening should favor the dollar over low-yielding currencies. It recommends maintaining long USD/JPY from 156.23, with a 163.00 target and 150.00 stop. Morgan Stanley also argues that Warsh’s emphasis on price stability could change the recent tendency for rising energy prices to support EUR/USD. Over the past six months, EUR/USD traded closely with energy prices as markets viewed the ECB as more sensitive than the Fed to the European inflation impact of higher gas prices. One-year US inflation swaps were around 2.6%, versus around 3.5% for Euro Area equivalents, roughly 175bp above February levels. If markets instead see the Fed as more responsive to energy-related inflation, rising energy prices could become less EUR-positive and more USD-positive. The report cites year-end energy forecasts of €88/MWh for TTF gas and $100/bbl for Brent as potential USD tailwinds. For Agency MBS, Morgan Stanley remains neutral but biased to become long on further weakness rather than sell strength. Mortgage yields are near highs since the global financial crisis excluding late 2023, and spreads are at their widest over the past year, making valuations attractive versus comparable assets. However, the firm sees near-term risks from deleveraging by floater holders or leveraged investors, uncertain bank demand while policy rates remain unsettled, stagnant GSE demand, and the possibility that tighter comparable-risk-asset spreads or higher volatility could widen mortgages further. It expects more favorable catalysts in 2027, including low supply at current rate levels, potential stronger bank demand with Basel clarity and improved ability to hedge held-to-maturity rate risk, and possible buying from GSEs and overseas pension funds. For tax-exempt municipal bonds, Morgan Stanley sees historically attractive entry levels as index yields approach 4.5%, but remains neutral rather than bullish. It prefers a duration-neutral barbell over a ladder because further curve flattening may accompany the Fed’s effort to restore inflation-fighting credibility. The near-term offsets are a potential rise in post-FOMC supply and sluggish fund flows after a weak total-return quarter. It also flags de minimis tax effects if rates rise 50bp or more, which could pressure broad-market performance and liquidity for 4% coupons; accordingly, it favors a mix of 3% and 5% coupons relative to 4% coupons.

Analysis framework

Morgan Stanley begins with the Fed decision, dot plot and Chair Warsh’s language, then evaluates how the neutral-rate revision, inflation trends, geopolitics and commodity-price pass-through affect the likely policy path. It compares that forecast with market-implied policy pricing and extends the resulting rates outlook to curve, inflation-swap, FX, Agency MBS and municipal-bond trade views.

Methodology notes

• Fixed Income and CreditYield curve analysis

  Comparison of market-implied policy rates, FOMC projections and Morgan Stanley's projected Fed path.

  The report uses the expected path of short rates and curve flattening to identify where markets may be under- or over-pricing further Fed tightening.

• Event-Driven and Behavioral FinanceEvent-driven analysis

  FOMC communication and geopolitical developments as market-moving events.

  The report interprets the policy decision, the chair's wording and energy-related geopolitical developments as catalysts that can alter rate, inflation and currency pricing.

• Other

  Relative-value analysis in CPI swap forwards, UST-SOFR swap spreads, Agency MBS and municipal bonds.

  Morgan Stanley compares related instruments, valuation levels, carry, supply-demand conditions and stated trade entry, target and stop levels to form its cross-market views.

Asset mapping & comparison

Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).

• SFRZ6Z7 curve flattener

  Expression of a potentially front-loaded Fed hiking cycle and higher hike-risk premium in 2H27.

  Strengths

  Potential to benefit from near-term hike repricing and medium-term growth downside risk.

  Comparison

  Entered at +40bp, with a +10bp target and +50bp initial stop.

  Risks

  A prolonged Fed pause that later requires catch-up tightening to return inflation to 2%.

• USD/JPY

  Morgan Stanley views the September FOMC outcome as supportive of USD appreciation against the yen.

  Strengths

  Higher expected US rates and curve flattening may support the dollar versus a low-yielding currency.

  Comparison

  Maintain long from 156.23, targeting 163.00 with a 150.00 stop.

  Risks

  JPY carry positions may unwind, including through Japanese investor repatriation.

• Agency MBS

  Neutral currently, with a preference to buy basis on further weakness.

  Strengths

  Index yields are near post-GFC highs excluding late 2023, spreads are at one-year wides, and supply may remain low at current rate levels.

  Weaknesses

  Near-term policy uncertainty, uncertain bank demand and stagnant GSE demand may delay improvement.

  Comparison

  The report considers mortgages attractive versus comparable asset classes but potentially vulnerable to wider spreads.

  Risks

  Deleveraging flows, floater duration extension, weaker marginal demand, or broader risk-asset widening.

• Tax-exempt municipal bonds

  Neutral tax-exempt basis with a duration-neutral barbell preference.

  Strengths

  Yields approaching 4.5% provide an unusually attractive entry point.

  Weaknesses

  Potential supply pickup and weak flows following poor total returns limit the case for a bullish stance.

  Comparison

  Morgan Stanley prefers barbells over ladders and favors a mix of 3% and 5% coupons relative to 4% coupons.

  Risks

  A 50bp-or-greater rise in yields could increase de minimis tax effects and weigh on liquidity and broad-market performance.

Key data

• September Fed policy-rate increase25bp to 3.75%-4.00%The starting point for Morgan Stanley's revised policy forecast.
• Morgan Stanley terminal-rate forecast4.25%-4.50%Based on additional 25bp hikes in December 2026 and March 2027.
• FOMC participant projections8 of 18 participantsExpected an additional hike in 2027, while the median dot showed one further hike in 2026.
• Longer-run neutral-rate estimate3.25%Revised up from 3.06%.
• USD/JPY trade levels156.23 entry, 163.00 target, 150.00 stopMorgan Stanley recommends maintaining the long position.
• Euro Area versus US one-year inflation swapsAround 3.5% versus around 2.6%Euro Area inflation swaps were roughly 175bp above February levels.
• Municipal index yieldsApproaching 4.5%Morgan Stanley describes this as among the best entry points of the past 15 years.

Impact & implications

The report expects the FOMC communication to lift near-term pricing for further tightening, flatten the US curve and support the dollar, while leaving greater uncertainty around the ultimate 2027 policy path. It favors selected rates, inflation and FX expressions, but advises waiting for weaker entry points in Agency MBS and remains neutral on tax-exempt munis despite attractive starting yields.

Risks

• Middle East de-escalation or lower energy prices could reduce inflation pressure and lead to fewer Fed hikes than Morgan Stanley forecasts.
• The report may be placing too much weight on Chair Warsh’s language and on the uncertain neutral-rate estimate.
• A prolonged Fed pause could eventually require catch-up tightening, creating risk for the SFRZ6Z7 flattener.
• Agency MBS could weaken further if deleveraging emerges, marginal demand deteriorates or comparable risk assets widen.
• Municipal-bond supply, sluggish fund flows and de minimis effects if yields rise 50bp or more could hurt performance.

What to watch

• Whether inflation trends improve enough to remove the need for further hikes.
• Developments in the Middle East, oil and commodity prices, and their transmission into core inflation.
• Market-implied odds of an October hike and the timing of subsequent FOMC action.
• The Fed's evolving reaction function and its willingness to give forward guidance.
• European gas prices, storage conditions and TTF movement toward the €85/MWh forecast or €100/MWh bull case.
• Agency MBS demand from banks, GSEs and overseas pension funds, along with deleveraging flows.
• Post-FOMC municipal supply and fund-flow conditions.