Defense contractors are winning on Wall Street , as the uncertainty of a war with Iran and increased tension in the Middle East continue to fuel substantial gains in the stock market.  While oil prices surged the highest Monday, jumping more than 6% over fears of a global supply shortage, companies that build military equipment weren’t far behind — Lockheed Martin and RTX, formerly known as Raytheon, gained 3.3% and 4.7% respectively. Shares of Northrop Grumman jumped the highest, ending the