Black rainstorm warning

Black rainstorm signals are issued by Hong Kong's Observatory and warn the public of heavy rain which is likely to bring about serious road flooding and traffic congestion. They will trigger response actions by Government departments and major transport and utility operators.

It was weather for ducks, not investors, in the city yesterday. The rainstorm warning was issued just after 4am. Photo: Felix Wong

All rain, no gain for HKEx as storm alert halts trading

Hong Kong's first black rainstorm warning since 2010 forced the stock exchange to halt trading yesterday morning, resulting in lost turnover of more than 10 per cent for the world's biggest exchange operator.