* KOSPI rises, foreigners net buyers

* Korean won strengthens against dollar

* South Korea benchmark bond yield falls

* For the midday report, please click

SEOUL, May 22 (Reuters) - Round-up of South Korean financial markets:

** South Korean shares rose on Monday for a sixth straight session, as investors took relief from the progress in the U.S. debt ceiling negotiations. The Korean won strengthened, while the benchmark bond yield fell.

** The benchmark KOSPI closed up 19.29 points, or 0.76%, at 2,557.08, marking the highest level since April 20.

** U.S. President Joe Biden and House Republican Speaker Kevin McCarthy will meet to discuss the debt ceiling later in the day, after a "productive" phone call, the two sides said.

** "The local market tracked the broader Asian market's relief rally on the news that the negotiations will continue," said analyst Seo Jung-hun at Samsung Securities.

** Chipmakers Samsung Electronics and SK Hynix ended up 0.15% and 0.92%, respectively, after China's move to restrict U.S. peer Micron Technology's business in the country.

** Markets appeared to show scant response to data that signalled South Korean exports for the first 20 days of May fell 16.1% from last year.

** Meanwhile, South Korea's finance minister said the government is not considering introducing a supplementary budget to increase bond issuance despite a weak tax revenue outlook.

** Of the total 931 issues traded, 637 shares rose.

** Foreigners were net buyers of shares worth 238.6 billion won ($180.63 million).

** The won ended onshore trade at 1,318.1 per dollar, 0.65% higher than its previous close.

** In money and debt markets, June futures on three-year treasury bonds rose 0.06 point to 104.82.

** The most liquid three-year Korean treasury bond yield dropped 2.2 basis points to 3.323%, while the benchmark 10-year yield fell 2.0 basis points to 3.400%.

($1 = 1,320.9300 won) (Reporting by Jihoon Lee; Editing by Sherry Jacob-Phillips)