Despite early signs that the 2011 IPO market might recover, including successful first-day performances from LinkedIn and Angie's List, the year ended flat.

Hotly-anticipated IPOs from Groupon and Zynga failed to live up to expectations and the long, hoped-for Facebook IPO did not materialize. Renaissance Capital found that roughly 70% of the companies that went public in 2011 were trading below their opening prices. Investors expecting strong returns were left largely disappointed, and scrutiny will be strong in 2012 from ...