* KOSPI falls, foreigners net buyers

* Korean won weakens against dollar

* South Korea benchmark bond yield rises

SEOUL, Dec 7 (Reuters) - Round-up of South Korean financial markets:

** South Korean shares fell on Thursday as traders braced for a fallout after ratings agency Moody's cut its outlook for banks in China, the country's biggest trading partner, while markets also tracked overnight losses in Wall Street.

** The won weakened, while the benchmark bond yield rose.

** The benchmark KOSPI was down 4.48 points, or 0.18%, at 2,490.90 by 0103 GMT.

** Among index heavyweights, chipmaker Samsung Electronics fell 0.42% and peer SK Hynix gained 1.35%, while battery maker LG Energy Solution slid 0.12%.

** Moody's put Hong Kong, Macau and swathes of China's state-owned firms and banks on downgrade warnings on Wednesday as it wasted little time in following up on an identical move the previous day on the mainland government's ratings.

** U.S. stocks ended down on Wednesday, pulled lower by megacaps and energy shares as signs of a cooling jobs market reinforced expectations that the Federal Reserve could start cutting interest rates early next year.

** Shares of South Korean company Hyundai Motor shed 0.49% and sister automaker Kia Corp lost 0.59%, while search engine Naver and instant messenger Kakao were up 0.23% and up 0.40%, respectively.

** Foreigners were net buyers of shares worth 71.9 billion won on the main board on Thursday.

** The won was quoted at 1,318.6 per dollar on the onshore settlement platform, 0.42% lower than its previous close at 1,313.1.

** In offshore trading, the won was quoted at 1,318.6 per dollar, down 0.2% on the day, while in non-deliverable forward trading its one-month contract was quoted at 1,315.9.

** The KOSPI rose 11.38% so far this year, and gained 5.6% in the previous 30 trading sessions.

** The most liquid three-year Korean treasury bond yield rose 1 basis point to 3.465%, while the benchmark 10-year yield climbed 0.1 basis point to 3.525%.

(Reporting by Cynthia Kim; Editing by Sherry Jacob-Phillips)