Shares of technology companies fell as investors sold out of some of the stocks considered "stay-at-home" plays.

Shares of Slack Technologies shares slid after analysts at brokerage Morgan Stanley cut their rating on the workplace productivity technology maker, citing competitive risks from Microsoft, Zoom Video Communications, Google, and others. Zoom Video shares ticked down in volatile trade.

Tesla shares ticked up ahead of the electric-car maker's earnings.

Shares of GSX Techedu plunged after analysts at brokerage Credit Suisse cut their ratings on the Chinese online education company.

Shares of Google parent Alphabet rose as investors bet the search giant would come through its upcoming antitrust case relatively unscathed.

Write to Rob Curran at rob.curran@dowjones.com

(END) Dow Jones Newswires

10-21-20 1712ET