(Adds additional fund flows, analyst quote)
NEW YORK, Aug 8 (Reuters) - Investors worldwide pulled a record $11.4 billion out of high-yield junk bond funds and bailed out of stock funds at the most frantic pace in six months in the week ended Aug. 6, data from a Bank of America Merrill Lynch Global Research report showed on Friday.
The outflows from junk bond funds and stock funds offered one of the strongest signals yet of a growing wariness over risk assets. Stock funds posted net outflows of $16.3 billion, their biggest since February.
The outflows were the fourth straight week of withdrawals from junk bond funds. Bond funds overall posted $3.2 billion in net outflows, marking their first withdrawals in seven weeks, according to the report, which also cited data from fund-tracker EPFR Global.
The outflows from junk bond funds underscored growing investor concerns about stretched valuations in the securities after the sector's multi-year rally.
The U.S. Federal Reserve's policy of keeping interest rates low has led many to pour cash into high-yield bond funds amid a lack of alternatives, and those investors are "ready to leave at the first sign of trouble," said Martin Fridson, chief investment officer of wealth management firm Lehmann Livian Fridson LLC.
The net outflows from stock funds came after inflows of $11.3 billion the prior week, which were the biggest in six weeks. U.S.-focused stock funds posted $19 billion in outflows, with the SPDR S&P 500 ETF Trust accounting for $14 billion of the withdrawals, according to the report.
(Reporting by Sam Forgione; Editing by James Dalgleish and Meredith Mazzilli)