* KOSPI falls, foreigners net buyers
* Korean won strengthens against dollar
* South Korea benchmark bond yield falls
SEOUL, Aug 18 (Reuters) - Round-up of South Korean financial markets:
** South Korean shares tracked Wall Street lower on Friday and looked set to post their worst week so far this year.
** The benchmark KOSPI fell 9.80 points, or 0.39%, to 2,510.05, as of 0144 GMT, extending losses for a sixth session.
** The KOSPI has declined 3.1% so far in the week, heading for its biggest weekly loss since the last week of 2022.
** The number of Americans filing new claims for unemployment benefits fell last week, pointing to continued tightness in the labour market.
** Chipmaker Samsung Electronics fell 0.30%, while peer SK Hynix gained 2.26%. Battery maker LG Energy Solution slid 2.41%.
** Celltrion jumped 4.67% after the biopharmaceutical manufacturer announced a plan to absorb a subsidiary company, Celltrion Healthcare.
** Among other index heavyweights, online platform companies fell while automakers gained. Of the total 931 issues traded, 274 shares rose.
** Foreigners were net buyers of shares worth 41.6 billion won ($31.14 million).
** The won was quoted at 1,335.5 per dollar on the onshore settlement platform, 0.49% higher than its previous close.
** The won was down 0.8% for the week, on track for a third straight week of weakening.
** In money and debt markets, September futures on three-year treasury bonds rose 0.10 point to 103.40.
** The most liquid three-year Korean treasury bond yield fell by 2.9 basis points to 3.762%, while the benchmark 10-year yield fell by 5.6 basis points to 3.930%. ($1 = 1,335.7300 won) (Reporting by Jihoon Lee; Editing by Subhranshu Sahu)