JPMorgan Chase Chief Executive Jamie Dimon said on Tuesday he was “a little optimistic” about the long-term prospects for stability in the Middle East despite the short-term risks created by the war in the Gulf.The conflict, launched by the US and Israel against Iran on Feb. 28, has upended markets, sent oil prices soaring, fueled global inflation fears and convulsed the post-war Western alliance.Dimon, however, said the conflict had highlighted a shift in mentality within the region that could now create c ...