* KOSPI rises, foreigners net sellers
* Korean won weakens against U.S. dollar
* South Korea benchmark bond yield falls
* For the midday report, please click
SEOUL, July 23 (Reuters) – Round-up of South Korean financial markets:
** South Korean shares closed higher on Friday, building on the previous session’s sharp gains, as earnings optimism and positive cues from Wall Street underpinned markets. The won weakened, while the benchmark bond yield fell.
** The KOSPI closed up 4.21 points, or 0.13%, at 3,254.42. The index rose 1.07% on Thursday, marking its best day in two months on upbeat earnings from Hyundai Motor and POSCO.
** For the week, it fell 0.69%, reversing a 1.83% gain marked in the previous week.
** Among heavyweights, internet giant Naver and messenger app operator Kakao jumped 2.73% and 1.36%, respectively. Chip giants Samsung Electronics and SK Hynix, however, slid 0.50% and 0.84% each.
** Foreigners were net sellers of 163.6 billion won…