It looks like it. On Monday Jan 21 we have the biggest drop of global stock markets in recent years (see the quoted news below).
I want to talk a little about the Chinese market in specific. It appears to me two pieces of news helped driving the market down. The huge secondary offering of $22 billion from Ping An Insurance (SHA:601318); the talk of starting stock index future market and a Nasdaq-like Market in China after March 2008, by Mr. Cheng Si Wei, Chairman of Finance Committe of National People Congress. 成思危：创业板和股指期货准备工作基本就绪.
But as individual investors I think we should remain calm even in this crazy market. It may be a good idea to get rid of some bubble-priced stocks because we are not going to see that price for a while. Note bubble is relative the intrinsic value of a company, not compared to the previous high price (e.g, VMW, AAPL, N,…are all risky to me).
AP news: stock markets plunge worldwide.