** Shares of steelmaker Posco 005490.KS jump as much as 5
pct as investors continue to come in after the United States
exempted tariffs on South Korean steel under quota urn:newsml:reuters.com:*:nL3N1R819V
** Posco shares post biggest intraday pct gain since Feb 1;
head for second straight session of gains
** Shares of Dongbu Steel 016380.KS and Seah Steel
003030.KS fall over 3 pct each as these two companies could be
negatively affected when given U.S. quota, said Bang Min-jin, an
analyst at Eugene Investment & Securities
** Broader market .KS11 up 0.6 pct as of 0457 GMT
((Reuters Messaging: dahee.kim@thomsonreuters.com))