SI411: Why the Best Portfolios Are Built to Be Wrong ft. David Dredge & Richard Brennan

Financial markets function as complex adaptive systems characterized by non-stationarity and reflexivity, rather than predictable statistical distributions. Traditional risk metrics like volatility and Sharpe ratios fail to account for path dependency and the geometric reality of wealth production, often masking fragility during quiet periods. Leverage, whether explicit or implicit through volatility selling, acts as a primary driver of market imbalances, creating fat-tailed risks that emerge endogenously. Effective risk management requires shifting from optimizing backward-looking expectations to building resilient architectures that incorporate positive convexity. By prioritizing accountability and maintaining small, diversified bets, investors can better navigate the fractal nature of markets, where extreme events—rather than average outcomes—determine long-term survival and compounding success.