Groupon, the online coupon site's IPO could possibly be smaller than originally thought as inaccuracies in management, repeated results and regulatory analysis affect investor's view of the company, Bloomberg reported. The valuation range could drop to about $3 billion to $5 billion. Earlier in the year, $25 billion was discussed, while Google (NASDAQ:GOOG) offered $6 billion last year. Josef Schuster, founder of investment firm IPOX Schuster, "Interest is diminishing by the week. All the news that's coming out underlines some form of turmoil in the company. As an IPO investor, you don't want that."

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