Nearly 96 million shares traded hands, according to NASDAQ, the largest one-day volume since 2015.
Source: YCharts. Click to enlarge.
Note: NASDAQ, YCharts, Bloomberg and Yahoo Finance all show different volumes.
My take: As near as I can tell, the value of the shares traded Friday—more than $20 billion—was an all-time record. Who was buying as the stock was falling? I’ll give you two guesses.