Easy to answer your question. I made a mistake guessing the bottom and then didn't cut my loss short. I wanted my money back badly. On the other hand, from its bottom to the current price, QIHU made a 40% gain. How many other stocks you own can make such a huge gain in such a short period of time? I'm not greedy and I want to lock in the 40+% gain. Unless having a superb earnings report, it won't go much higher given the 40+% gain already made. It's mainly an anti-virus software company after all.
That's good for QIHU share holders. However, mountains of overhead resistance ahead don't bode well for QIHU. Sharp sell-off will happen from time to time. But, this stock is short-term trader's paradise.
I don't see other reasons.
Buy, buy, buy.