Sorry, I couldn't find pricing data for that day. The closing price for Broadcom (AVGO) on December 31, 2018 was $21.11. It was down 1.4% for the day. The latest price is $342.46.
DATE
OPEN
HIGH
LOW
CLOSE
VOLUME
December 31 2018
$21.40
$21.46
$20.83
$21.11
26,589,960
Daily pricing data for Broadcom dates back to 8/6/2009, and may be incomplete.