Investing in a World of Low Expected Returns with AQR's Antti Ilmanen

Low expected returns in traditional asset classes necessitate a shift toward systematic investment strategies and increased patience. Current market valuations for stocks and bonds, while slightly improved, remain historically low, challenging the viability of traditional 60-40 portfolios. Antti Ilmanen, Principal at AQR Capital Management, highlights that expected returns are driven by yields, growth, and valuation changes, rather than mean reversion. Investors can potentially enhance long-term outcomes by incorporating alternative risk premia—specifically value, momentum, carry, and defensive strategies—which offer diversification and are less vulnerable to rising interest rates. Because market timing is notoriously difficult, success relies on maintaining humility and a long-term perspective. Furthermore, the illiquidity premium is often overstated, and GDP growth does not reliably translate into equity returns, underscoring the need for disciplined, evidence-based investment frameworks rather than relying on historical performance extrapolations.