March marked the 25th anniversary for the QQQ ETF, one of the granddaddies of them all. This ETF set the table for thousands more to follow. In this episode, Rich Excell CFA, CMT speaks with Paul Schroeder CMT, the QQQ Equity Product Strategist at Invesco, to talk about the history of QQQ, how the ETF landscape has evolved, and what it might look like going forward