Mutual funds endured their biggest beating in well more than a year. During the week ended June 5, investors yanked an estimated $11.53 billion from virtually all categories of long-term funds, giving them their first weekly outflow this year, according to the latest statistics from the Investment Company Institute.

The outflow exceeded last year’s mega outflow of $6.57 billion in early December, the year’s largest.

Bond funds were hit the hardest, losing $10.93 billion in estimated outflows for the most recent reported week. Investors pulled an estimated $8.68 billion from taxable bond funds and another $2.26 billion from municipal bonds.

U.S. stock funds also suffered, posting an estimated $2.52 billion in outflows, their third consecutive week in negative territory.

World equity funds were spared the pain. Investors steered an estimated $1.58 billion into non-U.S. stock funds for the week, more than double the $707 million they put into the funds a week earlier.

Hybrid funds, which invest in both stocks and fixed income securities, drew a modest $347 million in estimated inflows, a fraction of the $1.13 billion they attracted the week before.

The weekly fund flow estimates are derived from data covering more than 95% of industry assets, according to ICI.  The statistics cover long-term mutual funds, those the ICI defines as investing in long-term instruments.