S&P 500 Reaches New Height As Investors Shift Time Horizon

On the surface, it looks like the S&P 500 (Index: SPX) reached a new record closing high of 6,664.36 on Friday, 19 September 2025, because the U.S. Federal Reserve did exactly what investors expected to do.

The thing the Fed did that was so well-anticipated by everybody was to resume cutting the Federal Funds Rate after a nine month pause. The Fed's action to reduce this interest rate by a quarter point to a target range of 4.00-4.25% was, by far, the most noticeable market moving event of the week.

Being so well-anticipated, that action isn't what sent the S&P 500 to new record highs. The rate cut was effectively already built into stock prices.

The thing that did send stock prices 1.2% higher than their previous week's close was a new Lévy flight. Investors shifted their forward time horizon inward from the more distant future quarter of 2026-Q2 toward the nearer term future quarter of 2026-Q1.

The latest update of the alternative futures chart based on the dividend futures-based model shows that transition began on Monday, 15 September 2025 and continued throughout the week. By Friday, 19 September 2025, we observe investors would appear to be fully focused on 2026-Q1 as they set current day stock prices.
 

Alternative Futures - S&P 500 - 2025Q3 - Standard Model (m=-2.0 from 28 Apr 2025) - Snapshot on 19 Sep 2025


We think the reason for the shift of investor time horizon has to do with expectations for future rate cuts in 2026-Q1. After the Fed cut the Federal Funds Rate by a quarter point, the CME Group's FedWatch Tool projects two more quarter point cuts in 2025, coming on 29 October (2025-Q4) and 10 December (2025-Q4), then pausing for a cycle and resuming with another quarter point reduction on 18 March (2026-Q1).

Although the FedWatch tool indicates the Fed may pause in its new rate cut cycle, the open question is will it? We think the prospect the Fed will continue to cut the Federal Funds Rate at each of its rate-setting Federal Open Market Committee meetings through 2026-Q1 is sufficient to draw the forward-looking focus of investors inward to that less distant future quarter. Stock prices have risen in response because the outlook for year-over-year dividend growth in the quarter is more positive than what it is for 2026-Q2, where investors had, until this week, locked their attention since mid-August 2025.

Here are the market-moving headlines of the week that was, where both realized and potential personnel changes at the Fed helped fuel what investors expect may happen into early 2026.

Monday, 15 September 2025

Tuesday, 16 September 2025

Wednesday, 17 September 2025

Thursday, 18 September 2025

Friday, 19 September 2025

The Atlanta Fed's GDPNow tool projection of real GDP growth in the U.S. during the current quarter of 2025-Q2 ticked up to +3.3% after last week's forecast of +3.1% annualized growth.


More By This Author:

Anatomy Of A Bubble Stock
The Outlook For S&P 500 Dividends In September 2025
U.S. Recession Probability As Fed Finally Set To Resume Rate Cuts

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