The rout wiped out about $350 billion of market value in a week on the Shanghai and Shenzhen exchanges. It so traumatized traders that eight years later they still refer to the decline by the date it began: the 5/30 catastrophe.The milestone for the modern Chinese stock market, which began in 1990, started on midnight, May 30, 2007, with Hu Jintao’s government unexpectedly announcing it would triple a tax on stock trading. The plunge sparked by the pronouncement had followed a breathless rally, making it eerily similar to ...