It was a tough week for global markets, with banks enduring the biggest losses in U.S. equities.
All 24 stocks in the KBW Bank Index slumped last week on concern that lower interest rates will squeeze profits.
Traders have yanked more than $1.5 billion from all U.S.-listed exchange-traded funds tracking the financial sector in the week through Aug. 8, the fastest pace this year, according to data compiled by Bloomberg.
The Financial Select Sector SPDR Fund, or XLF, has seen eight straight days of outflows, totaling close to $3 billion.