* KOSPI falls, foreigners net sellers

* Korean won strengthens against U.S. dollar

* South Korea benchmark bond yield falls

* For the midday report, please click

SEOUL, Sept 21 (Reuters) - Round-up of South Korean financial markets:

** South Korean shares ended lower on Monday as concerns over surging coronavirus cases in Europe and fading U.S. fiscal stimulus hopes offset optimism around domestic trade and virus situations. The won gained, while the benchmark bond yield fell.

** The benchmark KOSPI closed down 23.01 points, or 0.95%, at 2,389.39, snapping a 0.26% gain in the previous session.

** European countries from Denmark to Greece announced new restrictions on Friday to curb surging infections in some of their largest cities, while Britain was reported to be considering a new national lockdown.

** South Korea's exports for the first 20 days of the month returned to growth for the first time since March, helped by higher microchip and car sales, data showed on Monday.

** Schools in the capital Seoul and nearby areas resumed in-person classes for the first time in almost a month on Monday after daily infections dropped to the lowest levels since mid-August.

** Heightened uncertainty over the U.S. presidential election following the death of U.S. Supreme Court Justice Ruth Bader Ginsburg also weighed on foreign investor sentiment, said Kiwoom Securities' analyst Seo Sang-young.

** Majority of market heavyweights tumbled, with biopharmaceutical firm Celltrion Inc and LG Chem leading losses.

** Foreigners were net sellers of 77.4 billion won ($66.86 million) worth of shares on the main board.

** The won ended trading at 1,158.0 per dollar on the onshore settlement platform, 0.20% higher than its previous close at 1,160.3.

** In offshore trading, the won was quoted at 1,157.6 per dollar, while in non-deliverable forward trading its one-month contract was quoted at 1,157.7.

** In money and debt markets, December futures on three-year treasury bonds rose 0.03 points to 111.81.

** The most liquid three-year Korean treasury bond yield fell by 0.4 basis points to 0.904%. ($1 = 1,157.6300 won) (Reporting by Joori Roh; Editing by Ramakrishnan M.)