Investors also flocked to low-risk money market funds, which attracted $2.8 billion, marking the fourth straight week of inflows into these funds. The funds are typically viewed as a safe place to park cash during bouts of volatility.
Investors took refuge in money market funds to protect themselves against a potential downturn in the U.S. stock market next week, Tjornehoj said.
The weekly Lipper fund flow data is compiled from reports issued by U.S.-domiciled mutual funds and exchange-traded funds.