. >> reporter: this year's top ipo performers included imperva, a leader in data security. gnc brand holdings, a mall favorite featuring nutrition bars. tangoe, a telecom group and a resign-- refiner and marketer of petroleum-based products this year's worst included china century dragon media a chinese television media buyer. friendfinder networks, a dating web site, imperial holdings, a specialty finance company and finally kips bay medical whichn develops products such as mesh stents for use in bypass surge rae. a and that prings us to the ipo market of 2012. >> the balance sheets of the companies coming public, the deleveraged aspects of those companies that are coming public all point to a very strong cycle for the ipo market. and one that is going to put the individual investor or the institutional investor in a very advantaged position because valuation models are at historic lows. >> reporter: companies david is watching out for includegogo, the company that provides internet access aboard planes. software company we a to counsels the tv industry nds group holdings