Since March of this year, Lockheed Martin (#LMT) has been struggling to earn back its stock gains. Before the #stock market sell-off in March, Lockheed Martin shares were trading at all time highs near $440. Now shares are trading at $353, which is -20% away from highs. Lockheed Martin is the largest defense contractor in the U.S. and in the entire world. The company makes military equipment such as helicopters, planes, missiles, and armored vehicles. In October of this year the company also decided to increase its dividend and is now paying a yield of 2.94%. Is now the time to buy Lockheed Martin shares?