For a Chinese stock, repurchase could be announced at any time and give market a surprise and boost the price, it may not be pre-documented somewhere. AES, YHOO, FEED… all gave shareholders or traders an opportunity to operate in the market.
No doubt, this is a catalyst.
BUY the fear (today), SELL the greed (Yesterday every one expected a “good” news)
Look, CGA is loaded up by smart money or somebody knowing something…