CNBC’s Bob Pisani spoke with Gerard O’Reilly, Co-CEO and CIO of Dimensional Fund Advisors – along with Ben Slavin, Global Head of ETFs at BNY Mellon. They discussed a hot trend in the ETF business that’s been the talk of the town for many industry observers – the same share class debate, or treating ETFs and mutual funds as both under the ETF wrapper. Vanguard’s been doing it for years, but now that the same-share class patent is expiring, will the SEC agree to renew it? In the “Markets 102” portion, Bob continued the conversation with Ben Slavin from BNY Mellon.