Here’s Why Hong Kong’s Stock Market Makes Some Investors Nervous

Hong Kong may be Asia’s premier financial hub and a favorite for U.S. and European stock investors, but away from the big names such as Tencent Holdings Ltd. traders must negotiate unusual practices that might seem out of place for the world’s fourth-biggest market. Here is a list of issues that are worrying some investors and vexing regulators.

Monumental price collapses, such as the five stocks that slumped more than 60 percent during a single trading session in November, are nothing unusual. The phenomenon can afflict groups of firms connected by shareholders or business line, but often there’s no obvious link. A common explanation is the practice of major shareholders pledging shares as collateral for loans, which can result in a lender suddenly dumping stock. The issue for money managers is that there’s no need to disclose such loans, except in limited circumstances, making it hard to assess the risks associated with some stocks and shareholders. Such patterns are unusual in developed markets and are a deterrent to investing in the city’s small and mid cap shares, said Rafi Mohideen, head of Asian trading at Nomura Holdings Inc.’s wholly owned Instinet Pacific.