Sorry, I couldn't find pricing data for that day. The closing price for Walmart (WMT) on July 31, 2015 was $19.74. It was down 0.6% for the day. The latest price is $101.18.
DATE
OPEN
HIGH
LOW
CLOSE
VOLUME
July 31 2015
$19.86
$19.88
$19.65
$19.74
23,785,200
Daily pricing data for Walmart dates back to 8/25/1972, and may be incomplete.