Back in Europe, shares of French carmaker Renault jumped 6.8% by 2:10 p.m. London time. The company, which owns a minority stake in Nissan , traded higher after reports that Nissan and Honda were entering into merger talks. Nissan’s Tokyo-listed shares gained more than 20% during Asia’s trading session Wednesday, marking the automaker’s best day in at least 40 years. — CNBC’s Lisa Kailai Han contributed to this market summary 17 Min Ago U.S. stocks open mixed U.S. stocks opened mixed on Wednesday as investors awaited the Federal Reserve’s December interest rate decision. The Dow Jones Industrial Average was up 0.17% in early deals after recording its longest losing streak since 1978 on Tuesday. The S&P 500 and Nasdaq Composite, meanwhile, were both down around 0.1%. — Karen Gilchrist