StockTwits Names COO

San Diego-based StockTwits, the online social media service focused on trading stock tips and information, has named Francisc Costello as Chief Operating Officer. Costello was most recently COO at Veoh Networks, and has also served at Akonix Systems, Entrypoint, and McKinsey & Company. StockTwits is headed by Howard Lindzon, and allows users to share real-time information about stocks and finances.