(Bloomberg) -- The Vanguard Group had its first monthly redemptions in almost 20 years in June as investors sold bond funds in anticipation of the Federal Reserve scaling back its asset purchases.

Vanguard saw net withdrawals of $100 million from mutual funds and exchange-traded funds for the month, the first since December 1994, John Woerth, a spokesman for the Valley Forge, Pennsylvania-based firm, wrote in an e-mailed statement. Investors pulled $9.7 billion from the company’s bond offerings, while adding to stock funds and money-market products.

“All streaks must come to an end,” Woerth wrote in the e-mail. Vanguard attracted $76.8 billion in investor deposits in the first half of 2013, he said.

The flight from bonds was triggered by Fed Chairman Ben Bernanke, who told Congress on May 22 that the U.S. central bank may start reducing its bond purchases. The yield on the 10-year Treasury note climbed to 2.64% today from 1.93% on May 21, according to data compiled byBloomberg.

Investors pulled about $60 billion from U.S. bond funds in June, the biggest monthly redemptions in records going back to 1961, according to estimates from the Investment Company Institute. Pacific Investment Management Co., the world’s largest active fixed-income manager, had a record $14.5 billion in net redemptions.

Vanguard managed more than $2.2 trillion in U.S. fund assets as of May 31, according to its website.