September Market Update

October 17, 2025

Market Indices Performance

A table showing the market indices of various stocks

September Recap

The S&P 500 rose 3.7% in September, hitting several new all-time highs and marking its fifth straight positive month.1 Big Tech stocks led the gains on the back of strong earnings and continued AI development. The benchmark 10yr Treasury yield ended lower, finally breaking below the 4.2% level as investors now expect three total rate cuts in 2025.2 


Due to the ongoing government shutdown, September’s inflation and labor market reports have been delayed. Expectations are for 3.1% inflation, 40k jobs added, and the unemployment rate remaining at 4.3%.3 This would send inflation back above 3% for the first time since May 2024, another setback given that price growth has remained above the Federal Reserve’s 2% target for more than four and a half years now (figure 1).



The Federal Reserve delivered the first rate cut of 2025 on the 17th, with Chair Jerome Powell characterizing the move as a ‘risk-management cut’ in the face of a weakening labor market.4

Line graph showing economic data with peaks and valleys over time; a circled area highlights a recent trend.

Current Developments (October)


On October 1, the government shut down over disagreements regarding healthcare funding. As of day 14, it has already become the 5th longest shutdown since 1976.5 Despite the political noise, stocks have historically held up well during shutdowns and performed even better afterwards (figure 2).



President Trump recently threated 100% tariffs on China following China’s announcement of further rare earth export controls.6 Markets initially dropped on the news but rebounded after Trump hinted that a deal is likely to be reached before the November 1 deadline. 

A baseline 10% tariff and tariffs on key trading partners like Canada (35%), Mexico (25%), India (50%), and Brazil (50%) remain in effect, while deals including 15% tariffs on most goods have been struck with Japan and the EU.7 

Table showing S&P 500 performance during & after government shutdowns, with historical data from 1976-2018.

The Future

After another quarter of double-digit earnings growth in Q2, S&P 500 earnings are expected to rise 8% in Q3.8 October is historically a mediocre month for stocks, but November and December typically deliver strong gains.9



Both Wall Street and the Federal Reserve continue to project two additional interest rate cuts in 2025, following the one in September.10 This would bring the federal funds rate down to a range of 3.50%-3.75% by the end of the year.

1. https://ycharts.com/indices/%5ESPXTR, https://ycharts.com/indices/%5EDJITR, https://ycharts.com/indices/%5ENACTR, https://ycharts.com/indices/%5ERUTTR, https://ycharts.com/indices/%5EMSEAFETR, https://ycharts.com/indices/%5EBBUSATR – Index Performance 

2. https://www.cnbc.com/bonds/ - Bond Yields

3. https://www.investing.com/economic-calendar/ - Economic data 

4. https://www.cnbc.com/2025/09/17/fed-rate-decision-september-2025.html - Fed rate cut

5. https://www.ncsl.org/in-dc/federal-government-shutdown-what-it-means-for-states-and-programs- Government Shutdowns

6. https://www.theguardian.com/us-news/2025/oct/14/china-us-world-economy-trump-tariffs China Tariffs

7. https://www.atlanticcouncil.org/programs/geoeconomics-center/trump-tariff-tracker/ - Tariffs

8. https://advantage.factset.com/hubfs/Website/Resources%20Section/Research%20Desk/Earnings%20Insight/EarningsInsight_101025.pdf - Earnings

9. https://www.nasdaq.com/articles/heres-the-average-stock-market-return-in-every-month-of-the-year – Monthly market history 

10. https://www.cmegroup.com/markets/interest-rates/cme-fedwatch-tool.html – Investor rate expectations 



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