A video sign displays the logo for Roku Inc, a Fox-backed video streaming firm, in Times Square after the company's IPO at the Nasdaq Market in New York, U.S., September 28, 2017. REUTERS/Brendan McDermid SAN FRANCISCO (Reuters) - Traders on Tuesday were “clamoring” to borrow shares of Roku in order to sell them short following the video-streaming company’s initial public offer last week, according to S3 Partners. Shares of the Los Gatos, California company dropped 8.