* KOSPI falls, foreigners net sellers

* Korean won little changed against dollar

* South Korea benchmark bond yield steady

SEOUL, Feb 21 (Reuters) - Round-up of South Korean financial markets:

** South Korean shares fell for a second straight session on Wednesday, with automakers and financial stocks extending losses.

** The benchmark KOSPI was down 0.36% to 2648.21 as of 0136 GMT. On Tuesday, it fell 0.84%.

** The KOSPI opened the session higher but reversed the course as shares of automakers and financial stocks turned down to fall for a second consecutive session.

** Their losses came after a recent rally underpinned by hopes that the government's corporate reform plan would boost undervalued stocks.

** Hyundai Motor fell 1.24% and sister automaker Kia Corp lost 0.52%, while auto parts maker Hyundai Mobis dropped 1.25%.

** The Korea Exchange Bank Index slid more than 1%.

** South Korea's exports for the first 20 days of February fell 7.8% from the same period the year before, as there were fewer working days due to the timing difference in the Lunar New Year holidays.

** The Bank of Korea is expected to keep interest rates steady on Thursday, after suggesting a pivot in monetary policy in January.

** Foreigners were net sellers of local shares worth 55 billion won ($41.16 million) on the main board.

** The won was quoted at 1,336.9 per dollar on the onshore settlement platform, 0.05% stronger than its previous close at 1,337.6.

** In money and debt markets, March futures on three-year treasury bonds rose 0.05 point to 104.49.

** The most liquid three-year Korean treasury bond yield was down 0.4 basis point to 3.399%, while the benchmark 10-year yield was down 0.5 basis point to 3.484%. ($1 = 1,336.2100 won) (Reporting by Jihoon Lee; Editing by Rashmi Aich)