Blockbuster IPOs: The Disappointing Day After

General Motors (GM) roared back onto the stock market on Nov. 18 with what could go down as the largest public offering ever. That marquee sale comes amid the busiest week for initial public offerings, or IPOs, since before 2008's financial crisis. But an analysis conducted for Businessweek.com by Bloomberg Rankings shows just how risky IPOs can be for the individual investor.

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