Korean stocks climbed Friday, with the benchmark KOSPI reclaiming the 6,600 level as a rally on Wall Street and a pullback in U.S. Treasury yields improved investor sentiment. Foreign and institutional investors turned net buyers after five consecutive sessions of selling, with net purchases of 479.3 billion won ($355 million) and 1.67 trillion won, respectively, providing a boost to the index. KOSPI started the session 1.14 percent higher at 6,654.36, up 74.88 points from the previous close. The index remained in positive territory throughout the session and ended 107.73 points, or 1.64 percent, higher at 6,687.21. U.S. stocks advanced across the board overnight as Treasury yields steadied. The Dow Jones Industrial Average rose 1.18 percent, while the other two major indexes also posted gains. The rally was partly fueled by comments from Federal Reserve Gov. Christopher Waller, who signaled he could support keeping interest rates unchanged at this month’s Federal Open Market Committee meeting, if incoming inflation data confirm that price pressures are continuing to ease. His remarks