UPDATE 1-U.S.-based junk bond funds see $2.6 bln in weekly outflows

(Adds quotes from head of Americas research at Lipper, table) By Jennifer Ablan and David Gaffen NEW YORK, June 11 (Reuters) - Investors in U.S.-based funds yanked $2.6 billion from high-yield "junk" portfolios in the week ended June 10, the most in five weeks, data from Thomson Reuters' Lipper service showed on Thursday. The cash withdrawals stemmed from exchange-traded-fund investors pulling capital from the iShares iBoxx $ High Yield Corporate Bond Fund, $1.06 billion, and the