Cliff Asness on Quant Value Investing

Episode Summary

Executive Summary: In this in-depth interview, Cliff Asness, co-founder of AQR Capital Management, discusses the evolution of quantitative investing, the interplay of value and momentum factors, and the psychological endurance required for factor-based strategies. He argues that value investing remains attractive despite recent gains, emphasizes the importance of combining multiple factors, and critiques market timing while advocating for 'sinning a little' at extremes. The conversation also covers trend following, buybacks, and the small cap effect, offering insights for both professional and individual investors.

Main Topics: Quantitative Factor Investing (Priority: 5/5): Exploration of value, momentum, size, low beta, and quality factors, their historical performance, and how combining them improves risk-adjusted returns. Value vs. Growth and Bubbles (Priority: 5/5): Analysis of value underperformance during the tech bubble and COVID-era, the role of behavioral biases, and the current opportunity in value stocks. Psychological Endurance in Investing (Priority: 4/5): The critical importance of stick-to-itiveness and emotional resilience when factor strategies face prolonged drawdowns. Market Timing and Valuation (Priority: 4/5): Discussion on the difficulty of timing markets based on valuation, the 'sin a little' approach, and the use of Schiller CAPE and bond yield forecasts. Trend Following and Macro Strategies (Priority: 4/5): How trend following and macro factors (including economic trends) provide diversification and perform well in long, slow bear markets like 2022. Controversial Topics: Buybacks and Small Caps (Priority: 3/5): Asness defends buybacks as largely neutral and argues the small cap effect is largely a data artifact after adjusting for delisting returns and beta miscalculation.

Key Arguments: Value and momentum are negatively correlated; combining them creates a 'holy grail' of quant finance with better risk-adjusted returns. Stick-to-itiveness is as important as intelligence for long-term success in factor investing; most investors cannot endure prolonged underperformance. Low beta stocks have historically matched high beta returns, making 'betting against beta' a viable strategy. Market timing based on valuation is a 'sin' but can be done occasionally when extremes are unprecedented (e.g., value spreads in 2019). Behavioral biases (not just risk premiums) explain many factor anomalies; Asness has shifted from 75% rational to 75% behavioral over his career. Trend following is not a panacea but provides valuable insurance against long, slow bear markets, unlike put options which hedge crashes. Buybacks are largely neutral; they are a tax-efficient dividend and not inherently evil, though they can be misused with executive compensation. The small cap effect disappears after correcting for delisting returns and underestimation of beta due to illiquidity.

Data Points: Value spread percentile: 89th percentile - After two years of value outperformance, the spread between cheap and expensive stocks remains at the 89th percentile, indicating still attractive valuations. 60/40 portfolio expected real return: From 4.5% to below 2% in 2021, then recovered to ~3% - Antti Ilmanen's forecast based on valuations showed a historic low for 60/40 expected returns at end of 2021, improving after 2022 selloff. Value spread in late 2019: Approaching tech bubble peaks - Asness wrote 'It's time for a venial value timing sin' as spreads neared 1999 levels, but COVID caused them to blow past those peaks. Trend following performance in 2022: Blowout year - Trend following strategies had a strong year in 2022, performing well during the long, slow bear market. Small cap effect after adjustments: Disappears - After accounting for delisting returns and underestimated beta from illiquidity, the small cap premium vanishes.

Pivotal Quotes: "If it's in the data, write the paper." — Gene Fama (quoted by Cliff Asness): Asness recalls Fama's response when he proposed exploring momentum despite its behavioral implications, showing Fama's openness to data. "No pain, no premium." — Wes Gray (quoted by Cliff Asness): Asness uses this phrase to emphasize that factor premiums require enduring painful drawdowns. "I thought you make your money because people have some behavioral biases... but when those biases get really ugly, you whine like a stuck pig." — Cliff Asness's wife: During the tech bubble, Asness's wife reminded him that his strategy relies on exploiting behavioral errors, so he should not complain when those errors become extreme.

Implications: Investors should adopt multi-factor approaches and prepare for long periods of underperformance. Current value opportunity remains compelling despite recent gains. Trend following can hedge against slow bear markets. Psychological resilience is as critical as quantitative skill. Buybacks are not inherently harmful; small cap effect is largely illusory.