U.S. Stocks Advance and Oil Pushes Higher

• Michael M. Santiago/Getty Images Oil prices extended gains Monday on signs that the war in Iran could last longer. Hopes of a ceasefire have faded in recent days with more U.S. troops arriving in the Middle East and Yemen’s Houthis joining the war. Meanwhile, the Journal reported that President Trump is weighing a military operation to extract Iran’s uranium. Most Read from The Wall Street Journal Together, those developments have driven oil prices higher. The most-active contract for Brent crude fu ...