* KOSPI firms, foreigners net sellers

* Korean won strengthens against dollar

* South Korea benchmark bond yield falls

SEOUL, Aug 29 (Reuters) - Round-up of South Korean financial markets:

** South Korean shares rose for a second session on Tuesday, led by the gains in the stocks of automakers and e-commerce firms. The won strengthened, while the benchmark bond yield fell.

** The benchmark KOSPI was up 7.91 points, or 0.31%, at 2,551.32 as of 0209 GMT, building on its 0.96% gain on Monday.

** The South Korean government plans to raise budget spending to nearly $497 billion for 2024 but the proposed increase is the smallest in two decades as authorities prioritise fiscal discipline amid weakening tax revenue due to slower economic growth.

** "The market is overall gaining on dip-buying after major events, but it does not show clear momentum," said Park Kwang-nam, an analyst at Mirae Asset Securities.

** Among index heavyweights, automakers and online platform companies were biggest gainers, followed by biopharmaceutical manufacturers, while battery makers fell.

** Hyundai Motor rose 1.35% and its sister automaker Kia Corp jumped 2.81%, while search engine Naver and instant messenger Kakao were up 0.94% and 1.04%, respectively.

** Of the total 931 issues traded, 631 shares rose.

** Foreigners were net sellers of shares worth 111.8 billion won ($84.64 million) on the main board so far on Tuesday.

** The won was quoted at 1,322.0 per dollar on the onshore settlement platform, 0.11% higher than its previous close at 1,323.4.

** In money and debt markets, September futures on three-year treasury bonds rose 0.08 point to 103.53.

** The most liquid three-year Korean treasury bond yield fell by 2.5 basis points to 3.734%, while the benchmark 10-year yield fell by 3.9 basis points to 3.832%. ($1 = 1,320.9200 won) (Reporting by Jihoon Lee; Editing by Rashmi Aich)