Sorry, I couldn't find pricing data for that day. The closing price for the S&P 500 (GSPC) on May 31, 2013 was $1,630.74. It was down 1.3% for the day. The latest price is $7,785.76.
| DATE | OPEN | HIGH | LOW | CLOSE | VOLUME |
|---|---|---|---|---|---|
May 31 2013 | $1,652.13 | $1,658.99 | $1,630.74 | $1,630.74 | 4,099,600,000 |
Daily pricing data for the S&P 500 dates back to 12/30/1927, and may be incomplete.