Rational Speculative Bubbles in Vietnamese Stock Market

The Vietnamese stock market like other emerging markets,faces problems of volatility and inefficiency. During 2006-2008, prices dramatically (the benchmark increased from 500 at beginning of 2006 to over 1,100 in mid of March 2007) then fell quickly (the benchmark was around 300 at the end of 2008). Many arguments explain fluctuations of stock prices through either imbalance between demand-supply of securities in the market, or ineffective monetary policy…The study sought to detect the presence of rational speculative bubbles in the stock markets. We conclude that there were rational speculative bubbles in the Vietnamese stock market, which were partially responsible for pushing up the stock prices.