* KOSPI falls, foreigners net sellers

* Korean won strengthens against dollar

* South Korea benchmark bond yield rises

* For the midday report, please click

SEOUL, Sept 18 (Reuters) - Round-up of South Korean financial markets:

** South Korean shares fell 1% on Monday, dragged down by heavyweight chipmakers on worries about a weak recovery in demand. The won strengthened, while the benchmark bond yield rose.

** The benchmark KOSPI closed down 26.56 points, or 1.02%, at 2,574.72. It was the biggest one-day loss since Aug. 16.

** Chipmaker Samsung Electronics fell 2.50% and posted its worst day since early April, while peer SK Hynix lost 2.78%.

** The world's top contract chipmaker TSMC has told its major suppliers to delay the delivery of high-end chipmaking equipment as it grows increasingly nervous about customer demand, Reuters reported on Friday.

** "There are worries about demand, but local chipmakers' losses today were a bit excessive in the short term as semiconductor prices are rising nonetheless," said Huh Jae-hwan, an analyst at Eugene Investment Securities.

** Broadly, investor focus is on policy meetings of major central banks this week, most notably the U.S. Federal Reserve and the Bank of Japan.

** Among other index heavyweights, automakers and online platform companies fell, while battery makers and biopharmaceutical manufacturers were mixed.

** Samsung Biologics added 0.14% on winning an order worth 321 billion won ($242.36 million).

** Of the total 936 traded issues, 330 shares advanced, while 551 declined.

** Foreigners were net sellers of shares worth 366.6 billion won ($276.79 million) on the main board for the day.

** The won ended onshore trade at 1,324.4 per dollar, 0.11% higher than its previous close at 1,325.9.

** In money and debt markets, September futures on three-year treasury bonds fell 0.11 point to 103.04.

** The most liquid three-year Korean treasury bond yield rose by 3.5 basis points to 3.885%, while the benchmark 10-year yield rose by 5.7 basis points to 3.985%. ($1 = 1,324.4600 won) (Reporting by Jihoon Lee; Editing by Sohini Goswami)