Even in normal times, finding a firm footing in the oil business is a slippery endeavor. UK oil major Shell posted its weakest quarterly profit in nearly half a decade on Thursday, sending its New York-listed shares down 5.3%. The drop occurred less than a week after US major Chevron reported declining profit, though that company’s shares have risen 4.7% since, thanks partly to its unique upside in Venezuela, the South American nation the Trump administration plans to “run” after deposing its president. ...