Dade Hayes Finance EditorRoku shares closed at a new record high of $255.67, up more than 10% for the day, on whispers of a distribution deal with HBO Max and a firm endorsement from billionaire media oracle John Malone.The stock has nearly doubled in 2020 as COVID-19 has boosted overall streaming hours. The influx of new services like Disney+, Apple TV+ and Peacock to challenge Netflix has been a positive development for the Los Gatos, CA-based tech firm.