The IPO market is showing some nervousness among investors. First Data (FDC) which is set to go public today at the New York Stock Exchange, priced shares at $16, below the expected range of $18-$20. The electronic payment processing company will sell 160 million shares so it looks like the payments-processing company will raise around $2.56 billion, which would make it the largest IPO this year. That comes direclty on the heels of Square, a competing payments company, revealing that it has filed papers for an initial public offering. It's expected to trade under the ticker symbol 'SQ' at the New York Stock Exchange. Meanwhile, Grocery chain Albertson's says it will delay its IPO until market conditions are more favorable. Netflix (NFLX) fell short of U.S. subscriber growth, adding 880,000 new customers where 1.19 million were expected. It blames customers transitioning to chip enabled credit cards for the miss. Managed health care company, United Health (UNH) reported results that were flat compared to last year but better than expected.