* KOSPI rises, foreigners net buyers

* Korean won steady against U.S. dollar

* South Korea benchmark bond yield rises

* For the midday report, please click

SEOUL, Nov 22 (Reuters) - Round-up of South Korean financial markets:

** South Korean shares closed on Monday at their highest level in three weeks, as chip heavyweights tracked U.S. peers higher amid a brightening outlook for memory chip demand. The won ended nearly flat, while the benchmark bond yield rose.

** Lifting risk appetite further was data that showed South Korean exports for the first 20 days of November had jumped 27.6% year-on-year on a continuing sales boost in semiconductor and petroleum products.

** The KOSPI ended up 42.23 points, or 1.42%, at 3,013.25, the highest close since Nov. 2.

** Chip giant Samsung Electronics jumped as much as 5.62% to a seven-week high, while its peer SK Hynix also soared to a 15-week peak, on optimism over chip demand and infrastructure investments in 2022.

** Foreign investors bought net 796.4 billion won ($671.86 million) worth of shares, while the foreign net buying into Samsung and SK Hynix took up nearly 92.6% of all in early trade.

** Among other heavyweights, platform company Naver and automaker Hyundai Motor added 1.49% and 4.3%, respectively.

** Trade is likely to be thinned this week by Thanksgiving in the United States, but traders are closely monitoring COVID-19 cases in Europe and central bank developments.

** Central banks in South Korea and New Zealand are expected to hike their rates this week.

** The won ended at 1,185.1 per dollar on the onshore settlement platform, nearly flat from its previous close.

** In offshore trading, the won was quoted at 1,185.4, up 0.1% from the previous day, while in non-deliverable forward trading its one-month contract was quoted at 1,185.9.

** The most liquid 3-year Korean treasury bond yield rose by 4.1 basis points to 2.005%, while the benchmark 10-year yield climbed 0.1 basis point to 2.372%.

($1 = 1,185.3600 won) (Reporting by Joori Roh; Editing by Sherry Jacob-Phillips)