Investors are digesting the news from over the weekend that Venezuelan President Nicolás Maduro no longer is in charge of the South American nation. Early returns are promising for energy firms. Key Takeaways Shares of oil producers, refiners, and oilfield-services firms rose sharply in early trading Monday, two days after the U.S. military launched a strike on Venezuela and captured Maduro to face drug-trafficking charges here. Maduro, who had been indicted during the first Trump administration, was set to ...