Volatility casts doubt on broader IPO market By: CNBC.com News October 15, 2015 at 15:13 PM EDT The biggest IPO of the year, FirstData, made its shaky debut on the NYSE. Its open has implications for the health of the IPO market. Read More >> Related Stocks: Bank of America Goldman Sachs Group Hortonworks New Relic Inc Performance Food Group Company Pure Storage Inc Wal-Mart Stores, Inc.