CNBC’s Seema Mody spoke with Dave Mazza, Chief Strategy Officer at Roundhill Investments, and John Davi, Founder and CEO of Astoria Portfolio Advisors. They drilled down on the A-I craze and broke down the Roundhill’s newly launched Generative A-I ETF (CHAT) – discussing who’s riding the A-I hype train and whether it’s here to stay. They also recapped a handful of May’s big ETF winners and looked ahead to what investors can expect come June.