Sorry, I couldn't find pricing data for that day. The closing price for the S&P 500 (GSPC) on March 6, 2009 was $683.38. It was down 0.1% for the day. The latest price is $6,449.80.
DATE
OPEN
HIGH
LOW
CLOSE
VOLUME
March 06 2009
$684.04
$699.09
$666.79
$683.38
7,331,830,000
Daily pricing data for the S&P 500 dates back to 12/30/1927, and may be incomplete.