China enacting tighter controls on press, microblogs, Caijing says China has prohibited media outlets from "arbitrary use" of foreign news releases without authorization and strengthened rules for the dissemination of news on micro blogging services like Sina's (SINA) Weibo, according to Caijing. Reference Link
SINA calls active as shares move off lows on renewed takeover speculation SINA March 33 and 34 weekly calls are active on 6K contracts (1K puts) amid renewed takeover speculation. March weekly call option implied volatility is at 48, April is at 30, May is at 33; compared to its 26-week average of 37 according to Track Data. Active call volume suggests traders taking positions for large price movement.