NEW YORK--(BUSINESS WIRE)--Rosen Law Firm, a global investor rights law firm, announces that a shareholder filed a class action on behalf of sellers of ordinary shares, including those that sold into the Merger of Sina Corporation (NASDAQ: SINA) between October 13, 2020 and March 22, 2021. Sina describes itself as a "media technology company that provides region-specific news, information, entertainment, and financial content.†For more information, submit a form, email attorney Phillip Kim, or. ...