The banking watchdog revealed on Thursday that it had received reports from banks about unauthorized stock trading activities in at least 22 online bank accounts in at least four banks. The sum involved was HK$45.97 million. Although the Hong Kong Monetary Authority said in a press statement on Thursday that none of the cases reported resulted in any fund transfers to unregistered third parties thanks to a double authentication process, the authority said there were nine cases that resulted in financial losses of HK$1.56 million.