[Huobi, OKG tumble in HK after China criminalises cryptocurrency trading to rein in financial risks] Cryptocurrency-related stocks plunged in Hong Kong, bearing the brunt of China’s latest regulatory squeeze on private businesses as authorities moved to ban all transactions to stop financial risks from spreading to society. The People’s Bank of China on Friday intensified its clampdown on digital currency by declaring all cryptocurrency transactions illegal and singling out offshore exchanges that target mainland Chinese users. It also promised to take action against its citizens for marketing the illicit services. About HK$1.2 billion (US$155 million) was erased in losses in...