S.Korea stocks edge up after Yellen's comments, won steady

* KOSPI set for a fourth positive session

* Won holds steady ahead of Brexit vote

SEOUL, June 22 (Reuters) - South Korean shares edged up

early on Wednesday, as U.S. Federal Reserve President Janet

Yellen's comments eased some uncertainty over the Fed's policy

outlook while more investors were cautiously betting for Britain

to stay in the European Union.

The Korea Composite Stock Price Index (KOSPI) was up

0.3 percent at 1,987.68 points as of 0214 GMT, set for a fourth

straight sess

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