Will the IPO season end with a whimper?

In a sign of uncertain times, the number of companies that have gone public this year has plummeted 75%.

Wind companies that have filed recently include First Wind Holdings (it's picked WNDY as a ticker), a Newton, Mass-based company that owns, develops and operates wind farms across the United States and in Canada. Another is Noble Environmental Power, which flipped the switch this year on new wind farms in New York and has other projects under development across the U.S.

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