Since early December , the stock price for some of the STI counter has increased much as compare to few months back . Just to recall what I have written in August to explain the concept of “ Linear Regression and Reverting to Mean “ in my blog about “ My Investment Strategy “ ( Click here ) . Of course there are concerns about China’s economic situation & debt stress in O&G industry which affecting the bank stocks and also some other concern in counters likeGLP / ARA / HKG Land separately . *** ARA might be different case as price increase due to propose of privatization . But seems that just in such short period of times , does the fundamental really changein these stocks which affecting their underlying business ? or just simply because of “mean reverting “ due to “ mood swing “ from pessimism to optimism ? Up to you to judge ! What do you think on the reason of price swing in such short time frame ? ......