Richard Bookstaber, who predicted the 2008 crisis in "A Demon of Our Own Design," warns that current economic risks may be more severe than 2008. Multiple interconnected threats—AI boom, $2 trillion private credit market, and geopolitical tensions—form a tightly coupled system where shocks propagate quickly across markets and industries.

The private credit market already shows strain as investors withdraw from funds like Blue Owl, BlackRock, and Blackstone, while AI concentration inflates tech valuations. Ten stocks now comprise over a third of the S&P 500, creating unprecedented concentration risk. When physical infrastructure stresses emerge—whether from Taiwan semiconductor disruptions or Iranian energy shocks—they immediately transmit through this complex financial network.

Financial models cannot properly assess physical risks to grids and supply chains. Unlike 2008's financial engineering risks, today's danger stems from the fusion of financial systems with physical world vulnerabilities. When this system faces stress, investors will sell what they can—public tech stocks—triggering cascading effects across portfolios and pensions.