Investors pulled $1.7 billion from U.S. funds that buy leveraged loans in the past week, the most since August 2011, according to Lipper.

The withdrawal extends the longest stretch of outflows since 2008 to 15 straight weeks, bringing the net amount pulled for the year to $13.1 billion. Investors added $1.7 billion to from U.S. funds that buy high-yield bonds, paring net outflows in 2014 to $17.5 billion, Lipper data show.

Loans have gained 1.46 percent this year, compared with a 3.74 percent return by this time in 2013, according to the Standard & Poor’s/LSTA U.S. Leveraged Loan 100 index. Prices fell to as low as 95.7 cents on the dollar last week.