Investors grew uneasy amid a global cyberattack and another setback to the Republican agenda in Washington.
The legendary music producer has nothing to do with the fund, except for offering up his name.
FireEye was among the companies to surge after a massive hacking attack impacted cities across the globe.
A Stanford study is the latest to point out signs of diminished efficiency in markets increasingly overrun by ETFs.
The Russell 2000 Index has fallen 4.5 percent from its March 1 high, on pace for its worst month since October.
Investors are looking ahead to the Trump administration's plans for tax reform and pro-growth economic policies.
Passive investors now control 14 percent of the S&P 500, up from 9 percent in 2013.
This after hedge fund exposure to U.S. stocks was at near record levels in late December.
The Research Affiliates co-founder doubles down on his warning about the popular vehicles.
Assets in smart-beta ETFs just topped $500 billion for the first time.