The ETF universe has enjoyed huge growth and many new trends may continue to support the industry.

“Our flows year-to-date have been $35 billion as of end of Q3, which is a little over twice that of last year,” Heather Fischer, Charles Schwab Investment Management, said at the Charles Schwab Impact Conference. “So, we’re just seeing phenomenal continued growth of ETF and at the platform.”

The increased assets accumulated in ETFs on the Charles Schwab platform is part of the overall theme across the investment industry as investors and money managers pour more money into the nifty investment vehicle.

Currently, the U.S. ETF marketplace holds 2,120 exchange traded products, which include both ETFs and exchange traded notes, from 123 fund sponsors with $3.5 trillion in assets under management after experiencing a record year of inflows in 2017.

Part of the growth at Charles Schwab has been attributed to the ETF OneSource commission-free ETF trading program.