U.S. stocks opened flat and quiet Wednesday. The Federal Reserve wraps up its 2 day meeting today on the economy and interest rates. Investors are waiting for the Federal Reserve statement at 2 pm ET to see if there are any clues about an interest rate hike this year. MasterCard (MA) revenue fell short of expectations on lower fuel prices and the strength of the U.S. dollar. Humana (HUM) beat profit and revenue expectations. The world's largest retailer has put suppliers on notice: pay attention to the amounts in their packaging. The Wall Street Journal says Walmart (WMT) sent letters last week to hundreds of suppliers from Kraft Heinz (KHC) to Nestle warning them to comply with labeling laws, emphasizing that the amount inside a package matches what is printed on the outside. UPS (UPS) says it will buy 46 million gallons of renewable fuel over the next 3 years to power its ground vehicles as it works to meet its goal of replacing 12% of the petroleum based fuel by 2017.