From Gregory Zuckerman and Bradley Hope:
For decades, investors imagined a time when data-driven traders would dominate financial markets. That day has arrived.
…. quantitative hedge funds are now responsible for 27% of all U.S. stock trades by investors, up from 14% in 2013, according to the Tabb Group, a research and consulting firm in New York.
Quants now dominate the short-term trading market but active managers (homo sapiens) are still very dominant in the much larger long-term investment market. And this is unlikely to change any time soon.