CNBC's Bob Pisani spoke with Anthony Denier, CEO of Webull, Andrew McOrmond, Managing Director at Wallachbeth Capital and Harry Whitton, Head of ETF Sales Trading at Old Mission Capital. They discussed the fallout from the market sell-off, will the emergence of a new Covid-19 variant add even more fuel to an already pro-growth, anti-cyclical trade in November? Plus, the popular trading app Webull - a rival to Robinhood - weighs in on sentiment as more young investors get into the ETF game.