san francisco share steel makers rally wednesday rocky start u.s.-china economic talk raise expectations president donald trump would impose tariff steel import 1500 steel index .spcomsteel jump 2.3 percent high level since early may u.s. steel x.n rise 4.9 percent ak steel aks.n gain 3.6 percent nucor nue.n climb 2.2 percent open remark annual summer dialogue washington beijing u.s. commerce secretary wilbur ross criticize china 347 billion trade surplus unite state ross comment heighten expectations wall street trump would follow threats apply new tariff remedy big problem steel dump china others investors essentially handicap probability trump announce broad-based anti-dumping measure steel import say longbow research analyst christopher olin honor promise make 2016 election campaign april year trump initiate section 232 review steel industry provision trade expansion act 1962 allow imposition tariff quotas import national security threaten steel producers unite state like u.s. steel corp ak steel stand benefit protectionist tariff would enable raise price tariff would hurt u.s. manufacturers buy steel keybanc capital market analyst philip gibbs say speculation commerce department would soon release section 232 report help steel stock add potential u.s. tariff steel could find illegal world trade organization rocky start u.s.-china talk push steel share high