The mysterious hour when China's great stock rally falls apart

Shanghai

IT'S the most dangerous hour in the Chinese stock market - when the world's biggest boom suddenly goes bust.

The time is 1:20 to 2:20pm, and its losses stand out in a rally that added 545 points, or 15 per cent, to the Shanghai Composite Index over the past 30 days.

In that hour alone, the equity gauge dropped 359 points. It fell in 19 of 30 sessions, the most consistent declines among rolling one-hour periods when the Shanghai b…