08 September 2026

S&P 500 Sees Little Change in Final Week of Summer 2026

An editorial cartoon of a Wall Street bull and bear enjoying a Labor Day holiday barbecue as the bear says 'I CAN'T BELIEVE SUMMER IS OVER ALREADY! WHAT ARE YOU LOOKING FORWARD TO THE REST OF THE YEAR?'. Image generated with Microsoft Copilot Designer.

The final week of summer saw the S&P 500 (Index: SPX) close out the week at 7,718.60, slightly up over the preceding week's close and one percent below its 13 August 2026 record high.

As expected, investors focused on the upcoming quarter of 2026-Q4 in setting stock prices. The future quarter has become the focus because of the Fed's ongoing "will they or won't they hike rates during the quarter" drama.

Speaking of which, the CME Group's FedWatch Tool projects a 59% probability the Fed will hike the Federal Funds Rate by a quarter percent on 16 September (2026-Q3), with a little under 41% chance of holding at its current target range of 3.50-3.75%. The big change from the previous week however is that the FedWatch Tool now projects the Fed will delay its next quarter point rate hike until 27 January (2027-Q1), although it still gives a 39% probability of an earlier rate hike on 8 December (2026-Q4).

The continuing uncertainty provides investors with an incentive to set their attention on 2026-Q4. The latest update of the alternative futures chart shows the S&P 500's trajectory remains consistent with the approximate level the dividend futures-based model would project for it provided investors focus their forward-looking attention upon 2026-Q4.

Alternative Futures - S&P 500 - 2026Q3 - Standard Model (m=-2.0 from 28 Apr 2025) - Snapshot on 4 Sep 2026

Here are the market moving headlines of the week that was:

Monday, 31 August 2026
Tuesday, 1 September 2026
Wednesday, 2 September 2026
Thursday, 3 September 2026
Friday, 4 September 2026

The headlines out of Japan suggest the recent rising yields of U.S. Treasuries have a "made in Japan" element to them. This factor may be significant because they would have an effect on the U.S. stock market, with higher yields depressing stock prices because of the resulting higher cost of debt. The effect would be most pronounced on firms that are looking to utilize significant debt financing to support their growth.

The Atlanta Fed's GDPNow tool anticipates +4.7% real GDP growth for the U.S. economy in 2026-Q3, ticking up from the +4.6% annualized growth it projected a week earlier.

Image credit: Microsoft Copilot Designer. Prompt: "An editorial cartoon of a Wall Street bull and bear enjoying a Labor Day holiday barbecue as the bear says ‘I CAN'T BELIEVE SUMMER IS OVER ALREADY! WHAT ARE YOU LOOKING FORWARD TO THE REST OF THE YEAR?’" We're not sure what the bull is thinking about with what they're barbecuing - perhaps they're a soy-based alternative to what they look like!