Sorry, I couldn't find pricing data for that day. The closing price for the Nasdaq Composite (IXIC) on June 29, 2018 was $7,510.30. It was down 0.4% for the day. The latest price is $22,487.42.
DATE
OPEN
HIGH
LOW
CLOSE
VOLUME
June 29 2018
$7,544.13
$7,573.59
$7,502.95
$7,510.30
2,208,820,000
Daily pricing data for the Nasdaq Composite dates back to 2/5/1971, and may be incomplete.