Sorry, I couldn't find pricing data for that day. The closing price for Apple (AAPL) on December 31, 1986 was $0.14. It was down 1.2% for the day. The latest price is $255.42.
DATE
OPEN
HIGH
LOW
CLOSE
VOLUME
December 31 1986
$0.14
$0.14
$0.14
$0.14
132,563,200
Daily pricing data for Apple dates back to 12/12/1980, and may be incomplete.