Sorry, I couldn't find pricing data for that day. The closing price for Riot Blockchain (RIOT) on May 8, 2020 was $1.85. It was up 5.7% for the day. The latest price is $7.94.
DATE
OPEN
HIGH
LOW
CLOSE
VOLUME
May 08 2020
$1.75
$2.13
$1.56
$1.85
20,202,631
Daily pricing data for Riot Blockchain dates back to 1/23/2003, and may be incomplete.