S&P 500 Falls at End of Worst Month Since June: Markets Wrap
U.S. stocks gave up earlier gains in the final hour of trading as volatility returned to Wall Street. The retreat followed a session in which slower-than-anticipated inflation data had initially supported stocks, while the S&P 500 ended what was described as its worst month since June.
U.S. stocks fell in the final hour of trading on Sept. 29, as a fresh bout of volatility gripped Wall Street. The decline erased gains recorded earlier in the session.
Stocks had risen after the release of slower-than-anticipated inflation data, according to Bloomberg. That initial advance did not hold through the close.
The S&P 500’s decline came at the end of what Bloomberg described as the index’s worst month since June. The supplied report did not provide the index’s closing level, the size of the monthly loss or details for other major benchmarks.
The report identified the late-session reversal as the main development in trading but did not specify what triggered the renewed volatility. No further market outlook or next steps were provided.
THE QUESTIONS THIS EVENT LEAVES BEHIND
What conditions caused the late-session volatility to overwhelm the earlier response to the inflation data?
Which investors or sectors benefited while the broader market gave up its gains?
How much did the month’s decline change expectations for future inflation or monetary policy?
What information was still unavailable to investors when the market reversed?
Would the market have closed higher without the final-hour volatility?
YOUR QUESTION
Does this story leave you with another question?
Send us the question the report did not answer. It may become the next question IAQ investigates.
GLOBAL CURIOSITY MAP · SEPTEMBER 2026