Sorry, I couldn't find pricing data for that day. The closing price for Microsoft (MSFT) on December 31, 2001 was $20.39. It was down 2.3% for the day. The latest price is $410.19.
DATE
OPEN
HIGH
LOW
CLOSE
VOLUME
December 31 2001
$20.88
$21.07
$20.39
$20.39
43,006,200
Daily pricing data for Microsoft dates back to 3/13/1986, and may be incomplete.