The closing price for the S&P 500 (GSPC) on January 20, 1981 was $131.65. It was down 2% for the day (down 2% from previous close). The latest price is $6,669.31.
DATE
OPEN
HIGH
LOW
CLOSE
VOLUME
January 20 1981
$134.37
$135.30
$131.26
$131.65
41,750,000
Daily pricing data for the S&P 500 dates back to 12/30/1927, and may be incomplete.