FTX CEO Sam Bankman-Fried and IEX CEO Brad Katsuyama join CNBC’s ‘Squawk Box’ to break down FTX’s strategic investment in the trading platform IEX. “It’s a really good opportunity for us to work together and work with the SEC and other regulators to build out pathways for digital asset securities,” FTX CEO Bankman-Fried tells CNBC.