Alibaba -4%, Baidu -3.2% amid Chinese tech rout; Yahoo -4.3% Option Trading Partners Tech News – Though not seeing the 10%+ declines witnessed by many U.S.-traded Chinese tech peers, Alibaba (NYSE: BABA) and Baidu (NASDAQ: BIDU) are down sharply following fresh overnight losses for the Shanghai and Shenzhen exchanges. Yahoo (NASDAQ: YHOO), whose 384M-share Alibaba stake…