** Brokerage stocks and financial counters in Hong Kong getting a beating as markets worry about long-term implications of this sell-off on retail investors and potential fallout on turnover. ** Hong Kong Exchanges and Clearing Ltd down 14 percent and heading for its biggest drop since October 2008 to HK$223, the lowest since April 8. The stock was down 9 percent in afternoon trade. ** CITIC Securities' H-shares falls 14.5 percent in Hong Kong to HK$23, its lowest since January 2015. The stock was down 9 percent in afternoon trade. ** Guotai Junan International Holdings Ltd slides 31 percent in its biggest drop ever to HK$3.04, the lowest since April 9. The stock was down 15 percent in afternoon trade. ** Haitong International Securities Group Ltd plunged 24.4 percent to HK$4.55, the lowest since April 8. The stock was down 20.8 percent in early afternoon trade, heading for its biggest drop since September 1998. ** Shares (Berlin: DI6.BE - news) of Guolian Securities plunged around 40 percent in its Hong Kong debut after raising $471 million for its listing.