Positive tariff news and some industry-specific speculation concerning future business helped light a rocket under defense stocks, sending the entire sector up. AeroVironment (AVAV 14.01%) shares led the way up 14%, and shares of Lockheed Martin (LMT 3.34%), Northrop Grumman (NOC 3.26%), and Science Applications International (SAIC 2.53%) all climbed as high as 5% before fading some heading into market close. New opportunities up ahead? Defense stocks have held up relatively well through this period of unce ...