Shares of Roku Inc. plunged Friday, putting them on track for their worst-ever weekly performance, as investors continued to express concern over increasing competition and an extreme valuation.

source https://finance.yahoo.com/m/c614802f-3669-3ba8-a791-0185b2ca8a35/roku%E2%80%99s-stock-rocked-as.html?.tsrc=rss