In times of market volatility, investors search for stability in their portfolios. Defense stocks can serve this need. If you are tired of watching high-growth stocks go up and down wildly and add stress to your life, you may want to transition some of your invested capital to defense-industry stocks that generate steadier returns with less volatility. Lockheed Martin (LMT -2.71%) is the perfect defense stock for you to buy right now. It has steady contracts with the U.S. and its allies around the world, an ...