"Bloomberg ETF IQ" focuses on the opportunities, risks and current trends tied to the trillions of dollars in the global exchange traded funds industry. Bloomberg's Katie Greifeld and Taylor Riggs speak to Lara Crigger, editor-in-chief of VettaFi, and Alexander Morris, president and CIO of F/m Investments. This week they discuss market volatility, cheap funds and the first single-bond ETFs.