Sorry, I couldn't find pricing data for that day. The closing price for Boeing (BA) on December 31, 1969 was $0.27. It was down 1.3% for the day. The latest price is $232.71.
DATE
OPEN
HIGH
LOW
CLOSE
VOLUME
December 31 1969
$0.28
$0.29
$0.27
$0.27
2,208,263
Daily pricing data for Boeing dates back to 1/2/1962, and may be incomplete.