* KOSPI tad higher, foreigners net sellers Korean won edges up against U.S. dollar South Korea benchmark bond yield edges up

SEOUL, May 23 (Reuters) - Round-up of South Korean financial markets:

** South Korean shares, won and bond yields were flat in early trade on Monday, as investors were cautious ahead of U.S. inflation data this week and after the Wall Street failed to give a clear hint in the prior session on global economic prospects.

** The benchmark KOSPI rose 3.24 points, or 0.12%, to 2,642.53 as of 01:42 GMT.

** "Investors are hesitating to change their position despite the local stock market's low valuations, and they prefer to wait until after the U.S. inflation data comes out later this week," said Samsung Securities analyst Seo Jung-hun.

** Among the heavyweights, technology giant Samsung Electronics fell 0.15% and peer SK Hynix was flat, while battery maker LG Energy Solution rose 0.46%.

** Foreigners were net sellers of 28.0 billion won ($22.05 million) worth of shares on the main board.

** The won was quoted at 1,267.5 per dollar on the onshore settlement platform, 0.05% higher than its previous close.

** The won showed a muted reaction to a rare U.S.-South Korea agreement to cooperate in keeping the foreign exchange market stable at their summit meeting on Saturday in Seoul.

** In offshore trading, the won was quoted at 1,267.8 per dollar, up 0.5% from the previous day, while in non-deliverable forward trading its one-month contract was quoted at 1,268.1.

** The KOSPI has fallen 11.25% so far this year, losing 2.1% in the previous 30 trading sessions.

** The trading volume in KOSPI was 239.12 million shares. Of the total 927 traded issues, 336 advanced.

** The most liquid 3-year Korean treasury bond yield rose by 0.1 basis point to 3.014%, while the benchmark 10-year yield rose by 0.7 basis points to 3.254%.

($1 = 1,269.8000 won) (Reporting by Choonsik Yoo; Additional reporting by Younah Moon; Editing by Rashmi Aich)