The closing price for the S&P 500 (GSPC) on May 17, 1989 was $317.48. It was up 0.7% for the day (up 0.7% from previous close). The latest price is $6,643.44.
DATE
OPEN
HIGH
LOW
CLOSE
VOLUME
May 17 1989
$315.28
$317.94
$315.11
$317.48
191,210,000
Daily pricing data for the S&P 500 dates back to 12/30/1927, and may be incomplete.