Oil prices rose and stock markets dropped in shaky trading worldwide Wednesday after President Trump raised doubts about the temporary truce in the war with Iran. The Standard & Poor’s 500 fell as much as 1.1% after Trump said the ceasefire agreement was “over,” but the index then trimmed its loss to 0.3% after Trump said recent fighting did not mean a return to full-scale war. They’re his latest mixed messages on what will happen with the war, which threatens to worsen inflation for the world. The Dow Jones industrial average dropped 576 points, or 1.1%, while the Nasdaq composite...