* KOSPI falls for third straight session

* Korean won touches more than 13-year low

* South Korea benchmark bond yield jumps

* For midday report, please click

SEOUL, Aug 19 (Reuters) - Round-up of South Korean financial markets:

** South Korean shares fell on Friday, marking their first weekly decline in five, as concerns over weighed over the tightening stance reaffirmed by U.S. monetary policymakers. The Korean won touched a more than 13-year low, while the benchmark bond yield jumped.

** The benchmark KOSPI ended down 15.36 points, or 0.61%, at 2,492.69, falling for a third straight session after hitting a more than two-month high earlier the week.

** The index fell 1.39% for the week, its biggest weekly fall since early July, ending a four-week rising streak.

** The Federal Reserve needs to keep raising borrowing costs to bring high inflation under control, a string of U.S. central bank officials said on Thursday, even as they debated how fast and how high to lift them.

** On top of their comments, robust economic data in the United States boosted the dollar, leading foreign investors to sell local stocks, said Huh Jae-hwan, analyst at Eugene Investment and Securities.

** Overseas investors were net sellers of shares worth 89.6 billion won ($67.54 million) on the main board, after a three-session buying streak.

** Among heavyweights, technology giant Samsung Electronics fell 0.98% but SK Hynix rose 0.73%, while battery maker LG Energy Solution lost 1.11%.

** Internet-based lender Kakaobank dropped 8.17% to its lowest close on record. Mobile financial services provider Kakaopay rebounded 0.58% after a 6.56% drop the previous session, while parent Kakao fell 3.16%.

** The won was last quoted at 1,325.9 per dollar on the onshore settlement platform, 0.39% lower than its previous close, after hitting its weakest since April 29, 2009 at 1,328.8.

** For the week, the currency lost 1.77% against dollar, the biggest drop in five weeks.

** In offshore trading, the won was quoted up 0.1% at 1,325.9 per dollar, while in non-deliverable forward trading its one-month contract was quoted at 1,325.5.

** In money and debt markets, September futures on three-year treasury bonds dropped 0.25 point to 105.02 in late afternoon trade.

** The most liquid 3-year Korean treasury bond yield rose by 7.9 basis points to 3.204%, while the benchmark 10-year yield jumped by 9.5 basis points to 3.316%. ($1 = 1,326.5400 won) (Reporting by Jihoon Lee; Editing by Alexander Smith)