Passive investing is more popular. But it's time to invest actively — here's why.

Passive investing has become more popular than active investing in the U.S., but the trend may be changing soon, according to Jill Carey Hall, U.S. equity strategist at BofA Global Research.The amount of assets managed by passive funds have overtaken those overseen by active funds, according to data from BofA Global Research. Only 47% of assets under management in the U.S. are now overseen by active funds, down from 80% in 2009, the data shows.  BofA Global Research Active investing means buying and sel ...