U.S. Stocks Post Biggest Rise in a Week.

The article states that the U.S. stock index the Dow Jones Industrial Average gained 0.9 percent, the U.S. stock index the Standard & Poor's (S&P) 500 gained 1.1 percent, and the Nasdaq Composite gained 0.9 percent following trading on December 15, 2015, the largest single-day gains since December 4, 2015. According to the article, energy firms such as Transocean and Exxon Mobil saw stock price increases, as did financial services firms Goldman Sachs Group, Wells Fargo & Co., and BlackRock.