Aug 6 (Reuters) - Shares of Robinhood Markets Inc rose about 3% before the bell on Friday after a roller-coaster week that lifted its market capitalization to $44 billion on interest from small-time investors on social media-based trading forums. The stock was trading at $52.29 by 8:16 a.m. ET and was the fifth-most actively traded stock across all U.S. exchanges. It was also by far the most discussed company on Reddit’s popular discussion group Wallstreetbets, according to sentiment aggregator Swaggystocks. After a tepid market debut last Thursday, Robinhood’s shares have seen wild swings in their first full week of trading, evocative of the “meme stock” rally that its trading app helped fuel earlier this year. The company’s shares surged as much as 82% on Wednesday, before tumbling 28% on Thursday as a filing showed more than a dozen investors could sell their stock over time. For the week, the shares are still up about 45%. (Reporting by Niket Nishant and Medha Singh in Bengaluru; Editing by Aditya Soni) Our Standards: The Thomson Reuters Trust Principles.