Is the US economy growing? Investors watch this By: CNBC.com News February 26, 2015 at 17:53 PM EST The primary data point in focus for investors on Friday is the second reading on the U.S. fourth-quarter gross domestic product growth. Read More >> Related Stocks: Amtd Idea Group Apple Avago Technologies Baker Hughes Inc Caterpillar Chevron Corp Google, Inc. McDonald's Corp