"Bloomberg ETF IQ" focuses on the opportunities, risks and current trends tied to the trillions of dollars in the global exchange traded funds industry. Today's guests: RBC Capital Markets Director of Global ETF Strategy Valerie Grimba, Tidal SVP Head of Business Development Brittany Christensen, Calamos Investments Global of ETFs Matt Kaufman, and TMX VettaAFI Head of Sector & Industry Research Roxanna Islam. (Source: Bloomberg)