Sorry, I couldn't find pricing data for that day. The closing price for the Nasdaq Composite (IXIC) on December 29, 2017 was $6,903.39. It was down 0.7% for the day. The latest price is $20,085.17.
DATE
OPEN
HIGH
LOW
CLOSE
VOLUME
December 29 2017
$6,952.61
$6,954.98
$6,903.39
$6,903.39
1,571,730,000
Daily pricing data for the Nasdaq Composite dates back to 2/5/1971, and may be incomplete.