Defense shares in Europe soar 7.5% after UK-led talks; Rheinmetall up 12%; BAE Systems climbs 17%

European markets were in negative territory after opening higher on Monday, despite a charge in defense shares after regional leaders held security talks that touched on bolstered military spending. The regional Stoxx 600 index was down 0.15% by 8:30 a.m. in London even as the Stoxx Europe…