ARK Invest CEO and CIO Cathie Wood tells Bloomberg that the lines between liquid and illiquid assets are beginning to blur as private markets evolve. Wood adds that while some private companies remain cautious about being held in ETFs, shifting definitions of liquidity, improved secondary-market trading, and deregulation may gradually change that calculus. She joined the discussion on "Bloomberg ETF IQ" with Katie Greifeld, Scarlet Fu and Eric Bulchuanas. (Source: Bloomberg)