Block believes AI will cause massive job losses and a GFC-level market fallout. He cites Mike Green's theory that passive flows have created unsustainable multiples that will violently reverse. A crisis triggered by AI fears or actual economic damage would cause redemptions from passive index funds (like those tracking the S&P 500). The flow reversal would act as a massive, indiscriminate selling force with few active buyers to absorb it, leading to a broad market crash. AVOID. While he expects a major downturn, he advises *against* shorting the "Mag 7" or index directly due to timing risk. His own protection is via option spreads, not outright short positions. The directive is to avoid being long the broad market. The passive flow dynamic remains stable, or a different catalyst (e.g., government intervention) prevents the violent deleveraging.