Bill Gross told CNBC his massive success will be difficult, if not impossible, for newcomers to repeat, given how much the investment landscape has changed.
"These days ... certainly the returns that are available to investors, not only in the bond market, but in the stock market, are much more difficult. The doubling these days are miraculous, if at all," Gross said in an interview to be aired Tuesday at 2 p.m. ET on "Power Lunch."
Gross founded investment management giant Pimco in 1971 and ran it until 2014. As of March, Pimco had $1.5 trillion in assets under management.