The primary data point in focus for investors on Friday is the second reading on the U.S. fourth-quarter gross domestic product growth. "People are looking at GDP to make sure the economy is still intact," said Marc Chaikin, CEO of Chaikin Analytics. Economists polled by Reuters expected U.S. growth in the fourth quarter to be revised down to 2.1 percent from a preliminary 2.6 percent. The Commerce Department on Tuesday revised up its GDP growth estimate to a 5 percent annual pace. "Obviously, expectations there are lowered pretty significantly," said JJ Kinahan, chief derivatives strategist at TD Ameritrade. The "GDP ... (full story)