* KOSPI rebounds from six-week low

* Korean won ends flat, after hitting 13-year low

* South Korea benchmark bond yield rises

* For the midday report, please click

SEOUL, Sept 6 (Reuters) - Round-up of South Korean financial markets:

** South Korean shares rebounded on Tuesday after falling for last three sessions, but gains were capped by dollar's strength and worries over Europe's energy struggle. The won ended flat, while the benchmark bond yield rose.

** The benchmark KOSPI ended up 6.34 points, or 0.26%, at 2,410.02, after the benchmark ended at its lowest since July 22.

** The Chinese yuan's gains after a foreign exchange ratio cut helped support the local forex and also stock markets, but they lost some of their early gains as the yuan and the dollar reversed their courses, said Lee Kyoung-min, analyst at Daishin Securities.

** China's central bank said on Monday it will cut the amount of foreign exchange reserves that financial institutions must hold.

** Among heavyweights, technology giant Samsung Electronics was unchanged, and battery maker LG Energy Solution rose 0.10%, while SK Hynix gained 0.77%, after the chipmaker revealed a plan to build a new chip plant.

** Foreigners were net sellers of shares worth 79.2 billion won ($57.65 million) on the main board, extending their sell-off to a fourth straight session.

** The won hit its weakest level since early April 2009 at 1,377.0 per dollar, before recovering most losses to end the onshore trade only 0.02% lower at 1,371.1.

** The foreign exchange authorities were again suspected of selling dollars to curb the won's fall near the end of the session, as it had been a day before.

** In offshore trading, the won was quoted down 0.4% at 1,374.2 per dollar, while in non-deliverable forward trading its one-month contract was quoted at 1,373.6.

** In money and debt markets, September futures on three-year treasury bonds fell 0.16 point to 103.65 in late afternoon trade.

** The most liquid 3-year Korean treasury bond yield rose by 7.1 basis points to 3.687%, while the benchmark 10-year yield rose by 3.2 basis points to 3.703%. ($1 = 1,373.9000 won) (Reporting by Jihoon Lee; Editing by Rashmi Aich)