[Mainland Chinese traders come to rescue of short video firm Kuaishou, HK’s worst-performing mega IPO] Kuaishou Technology, Hong Kong’s worst-performing jumbo listing this year, surged to its highest level in almost a month on Thursday after the stock became available for trading by mainland Chinese investors. China’s second-largest short video platform operator jumped by as much as 11 per cent to HK$93.50 on Thursday before paring gains to 5.2 per cent. The stock was added to the southbound channel buying of Hong Kong stocks by mainland investors of the Stock Connect with Hong Kong on Thursday, according to a statement...