Based on what? His word or does he have proof? Sounds like a short who got burned and he needs to cover. This kind of b.s. needs to stop on Wall St. Folks like this should be barred from posting this #$%$ and trading. I think QIHU is legit. I do want it to pullback, as I'd like to buy some before earnings next week...
Block just repeated what said back in Jan. He also said he is not betting against the comp. "He reiterated that he thinks Chinese Internet company Qihoo 360 Technology Co. is a “fraud,” though he said he wasn’t currently betting against the stock. "
I think he knows better than to short the stock here. Too much momentum.