U.S. stocks opened moderately higher Friday. Anthem (WLP) has made it official. It's buying Cigna (CI) for $54.2 billion, creating a health insurance giant. Together the companies will have 53 million customers. The merger does still have to get regulatory approval. Oil prices are falling again going deeper into the bear market entered on Thursday. China's Purchasing Manager's Index fell to its lowest level since March 2014. State Street (STT) said its profits were lower due to investors taking less risk in their investments. American Airlines (AAL) turned in record profit for the quarter, mostly on lower fuel prices. American is also doubling its stock buyback program. The Food and Drug Administration is set to approve a new class of cholesterol drugs which could be a game changer, according to cardiologists. The drugs are known as PCSK9 inhibitors are said to be a major advance in cholesterol care and could reduce the risk of heart attacks and strokes.