Sorry, I couldn't find pricing data for that day. The closing price for the S&P 500 (GSPC) on October 3, 2008 was $1,099.23. It was down 1.4% for the day. The latest price is $5,580.90.
DATE
OPEN
HIGH
LOW
CLOSE
VOLUME
October 03 2008
$1,115.16
$1,153.82
$1,098.14
$1,099.23
6,716,120,000
Daily pricing data for the S&P 500 dates back to 12/30/1927, and may be incomplete.