Sorry, I couldn't find pricing data for that day. The closing price for the S&P 500 (GSPC) in terms of gold (XAU) on September 25 was 2.15. It was up 0.1% for the day.
DATE
OPEN
HIGH
LOW
CLOSE
September 25 2024 20:00
2.15
—
—
2.15
Daily pricing data for the S&P 500 dates back to 12/30/1927, and may be incomplete.