Sorry, I couldn't find pricing data for that day. The closing price for JPMorgan Chase (JPM) on December 31, 2018 was $80.23. The latest price is $300.47.
DATE
OPEN
HIGH
LOW
CLOSE
VOLUME
December 31 2018
$80.20
$81.21
$79.53
$80.23
13,237,200
Daily pricing data for JPMorgan Chase dates back to 3/17/1980, and may be incomplete.