Sorry, I couldn't find pricing data for that day. The closing price for the Dow Jones Industrial Average (DJI) on May 18, 2018 was $24,715.09. The latest price is $46,247.29.
DATE
OPEN
HIGH
LOW
CLOSE
VOLUME
May 18 2018
$24,707.72
$24,774.97
$24,664.87
$24,715.09
269,696,371
Daily pricing data for the Dow Jones Industrial Average dates back to 1/2/1950, and may be incomplete.