Sorry, I couldn't find pricing data for that day. The closing price for Tesla (TSLA) on October 23, 2015 was $13.94. It was down 2.7% for the day. The latest price is $435.97.
DATE
OPEN
HIGH
LOW
CLOSE
VOLUME
October 23 2015
$14.33
$14.36
$13.85
$13.94
63,531,995
Daily pricing data for Tesla dates back to 6/29/2010, and may be incomplete.