Thoughts on the Market
2026-09-17 · Hosted by Mike Wilson · Morgan Stanley
Executive Summary
Morgan Stanley's Matthew Hornbach (Global Head of Macro Strategy) and Michael Gapen (Chief US Economist) discussed the Fed's quarter-point rate hike delivered at the September meeting, its first after a long pause. Gapen said the decision was in line with expectations but leaves the Fed in an awkward position: most of the current inflation appears to be supply-side (tariffs, energy) or AI-related demand-side, and modestly tighter rates are unlikely to directly address either driver. He expects the Fed will act as though it intends multiple hikes, though incoming disinflationary data could still produce an effective "one-and-done" outcome by year-end.
Key Stories & Changes
1. Fed Delivers Quarter-Point Hike, Leaves Ambiguous Path Forward
The Fed raised rates by 25 basis points in September, in line with market expectations
Michael Gapen: the Jackson Hole speech contained little detail on what's driving inflation, but made clear the Fed's only response to above-target inflation is tighter monetary policy
Most inflation is believed to be supply-side (tariffs, energy, deglobalization) or AI-related demand-side; modestly tighter rates are unlikely to directly address AI-driven inflation
Gapen: "the Fed is in a bit of a pickle" — acknowledging much of the inflation may not be fixable through its main policy tool
2. Is This "One and Done"?
Gapen: the committee is very likely thinking in terms of more than one move, since monetary policy works with a lag and a single 25bp move won't fundamentally alter the macro outlook
However, an "ex-post one and done" scenario is possible: if disinflation continues (three- and six-month annualized rates already point that direction), the Fed could stay in "ready to hike" posture without actually delivering a second move
BEA (Bureau of Economic Analysis) methodological revisions to PCE inflation data — including quality adjustments to software — are expected to lower the year-on-year inflation rate by roughly 1/10 of a percentage point or more, a factor that could support a slower, quarterly pace of hikes rather than back-to-back moves
3. Labor Market Plays a Secondary Role in the Decision
Gapen said the labor market is "secondary, if not tertiary" to the current hike decision
Wage/labor income growth is decelerating and modest, which doesn't suggest overheating
Recent job growth has averaged roughly 50,000 to 70,000 per month — "not amazing, but not awful either"
4. Treasury Market Pricing Driven Primarily by Energy Prices
Matthew Hornbach: investors are "reasonably nonplussed" about underlying US inflation trends, but energy price moves (Brent, WTI, gasoline) are the primary driver of how markets reprice the Fed's policy path week to week
Market-implied hiking cycle currently stands at about three hikes from current levels; the 10-year Treasury yield is near 5%, up from 4.25% earlier this year when two rate cuts were being priced instead
Hornbach pushed back on the idea that the absolute size of US debt drives yields: the 10-year sat near 4.25% both when debt was $31 trillion (four years ago) and now at $40 trillion — it's the pace of debt growth relative to investor expectations, not the level, that matters more
Trends Identified
1. The Fed Is Tightening Into Inflation It May Not Be Able to Fix
Both hosts converged on the idea that the Fed's rate hike is a blunt instrument aimed at inflation drivers — energy supply shocks and AI-driven demand — that don't respond cleanly to interest rate changes. This sets up a structural tension where the Fed may need to lean on rate-sensitive parts of the economy simply to show it's "doing something," even if the direct inflation drivers persist.
2. Energy Prices, Not Debt or Labor Data, Are Driving Treasury Yields
Hornbach's data-driven argument reframes a common market narrative: rather than the size of the federal debt determining bond yields, it is the market's real-time repricing of Fed policy — itself driven largely by oil and gasoline price swings — that best explains the surge in the 10-year yield from 4.25% to 5% this year.
3. Data Revisions Could Provide a Face-Saving Off-Ramp
The upcoming BEA methodology changes to PCE inflation data, expected to modestly lower reported inflation, could give the Fed a data-driven justification for pausing after limited additional hikes, allowing officials to maintain a hawkish stance in rhetoric while avoiding an aggressive back-to-back hiking cycle in practice. ---
Sentiment Analysis
Overall Market Sentiment: Analytically Cautious
Both hosts adopted a measured, data-focused tone, acknowledging the Fed's difficult position without expressing strong bullish or bearish conviction on markets directly.
Risk Factors Highlighted
Rate hikes may not address root inflation causes: Supply-side (tariffs, energy) and AI-driven demand-side inflation are not well-suited to monetary tightening, risking a prolonged period of elevated inflation despite Fed action.
Data revision uncertainty: Pending BEA methodological changes to PCE inflation could alter the inflation picture in either direction, adding uncertainty to the Fed's data-dependent path.
Energy price volatility as a policy wildcard: Since Treasury markets reprice heavily off energy prices, continued volatility in oil and gasoline could drive outsized swings in Fed rate expectations independent of underlying economic fundamentals.
Multi-hike cycle risk: If the committee proceeds with the multiple hikes it appears to be signaling, that raises the risk of over-tightening into an economy where inflation drivers are largely outside the Fed's control.
This episode was covered in today's [The Market Signal — 2026-09-17](https://marketsignal.beehiiv.com/p/the-market-signal-2026-09-17), a cross-source synthesis of multiple podcast reports.