WHY the SEPTEMBER SEP MATTERS MORE THAN the CUT ITSELF

At every meeting coinciding with a Summary of Economic Projections, the desk's attention shifts away from the rate decision itself. The decision is binary and largely priced. The SEP is continuous, multi-dimensional and capable of moving markets independently of what happens to the policy rate.

The September 2026 SEP updates projections across six variables: GDP growth, unemployment, PCE inflation, core PCE inflation, the federal funds rate path and the longer-run neutral rate. Any of these six can surprise relative to the June print. Together they define the policy environment for the next 12 to 18 months more precisely than a single 25bp move.

The key question entering September is whether the growth and inflation mix has evolved in a way that allows the Committee to lower its projected path without triggering the perception that it is responding to weakness rather than normalising to neutral.

The most consequential single variable in the September SEP will not be the 2026 median dot. It will be the longer-run federal funds rate, the SEP's proxy for the neutral real interest rate.

In March 2024 the longer-run median was 2.50 percent. By June 2026 it had drifted to 2.75 percent. If the September SEP marks it to 3.00 percent, that is a structural signal that the Committee believes the post-COVID economy operates at a higher equilibrium rate.

A 3.00 percent longer-run dot would reprice 10-year Treasuries. The current 10-year at 4.35 percent implies a longer-run rate of approximately 2.70 to 2.80 percent plus a 150 to 165bp term premium. If the longer-run rate shifts to 3.00 percent and the term premium holds, fair value for the 10-year moves to 4.50 to 4.65 percent.

The window between the June SEP and September meeting encompasses two payrolls prints, two CPI releases, one PCE update and the preliminary Q2 GDP estimate. The July payrolls at 162,000 with unemployment steady at 4.0 percent was broadly on-trend. The August print is more important.

The desk's base case entering the meeting: unemployment drifted to 4.1 percent and core PCE running at 2.6 to 2.7 percent year-on-year. In that environment the Committee has the inflation cover to cut and employment data provides mild urgency to begin normalisation.

Front-end positioning in rates markets entering September is moderately long. The CME FedWatch tool showed an 80 percent probability of a September cut, meaning the rate decision is largely priced. The residual risk is in the SEP.

The asymmetry is skewed toward the hawkish surprise. If the Committee cuts but the dots are unchanged or higher, the front end sells off modestly while the long end is unchanged or rallies. If the Committee cuts and dots are materially lower, the curve steepens and risk assets rally. If there is no cut, the front end reprices sharply higher.

The expected-value trade is to be long the front end but hedge the tail with December Fed Funds futures, which provide cheap protection against a hold scenario without requiring full exit from the positioning.

The September cut delivered as 25bp with a dot plot showing two additional cuts in 2026 versus one projected in June. The longer-run rate held at 2.75 percent. The market read was unambiguously dovish: 2-year Treasury fell 12bp, the S&P 500 rose 0.9 percent, and DXY fell 0.6 percent on the day.

For equity positioning, September validated the soft-landing narrative underpinning the 2026 equity rally. But the desk's read is that the equity market is pricing near-perfection: three FOMC cuts, steady unemployment and above-trend earnings growth simultaneously. Any one of those assumptions proving wrong in 2027 would produce a correction from current elevated multiples.