Midday Movers: VLO, HTZ & More By: CNBC.com News April 02, 2013 at 13:49 PM EDT Take a look at some of Tuesday's midday movers: Read More >> Related Stocks: Amgen Cigna Corp Delta Air Lines Garmin Ltd Groupon Cl A McDonald's Corp Procter & Gamble Tesoro Petroleum Co Valero Energy