China: Beijing’s war on the stock markets

April is the cruellest month, wrote TS Eliot. Chinese investors may beg to differ. They found May pretty cruel. In the past month the Beijing authorities have declared war on China's two principal stock markets, rattled by alleged speculation. This had carried the Shanghai domestic share index to gains of 55% since January, and pushed Shenzhen up 75%. By the time Beijing decided to act the two markets were on P/E ratios of nearly 50 times historical earnings. But at first Beijing's usually subtle hints had no impact on a market convinced of its own immortality.