"According to The Economist's 'Bubble guide,' China's recent share-price boom is still relatively modest compared with the giants of history. The chart plots the performance of Chinese share prices over the past five years against the three great bubbles of the 20th century: Wall Street in the 1920s, Japan in the 1980s and America's NASDAQ in the 1990s. The NASDAQ composite index saw a gain of more than 500 percent from 1995 to early 2000. Japan's Nikkei 225 jumped by 300 percent from 1984 to ...