Sorry, I couldn't find pricing data for that day. The closing price for the Dow Jones Industrial Average (DJI) on January 31, 2020 was $28,256.03. It was down 1.9% for the day. The latest price is $44,342.19.
DATE
OPEN
HIGH
LOW
CLOSE
VOLUME
January 31 2020
$28,813.04
$28,813.04
$28,169.53
$28,256.03
403,885,466
Daily pricing data for the Dow Jones Industrial Average dates back to 1/2/1950, and may be incomplete.