Cliff Asness from AQR: The Impact of Stories, Behaviour and Risk (EP.93)

Episode Summary

Executive Summary: Cliff Asness discusses market efficiency, factor investing, and why value has struggled yet may be more attractive than ever. He argues markets are not perfectly efficient, value’s recent pain doesn’t mean it’s broken, and communication plus discipline are essential for sticking with systematic strategies through long droughts.

Main Topics: Market efficiency and Cliff Asness’s view vs. Fama (Priority: 5/5): Asness defines efficiency as prices reflecting information, but says markets are not perfectly efficient and he is less extreme than Eugene Fama on the efficiency spectrum. Value investing under stress (Priority: 5/5): He explains why value has underperformed, why that doesn’t invalidate the factor, and why current valuation spreads suggest better forward returns despite recent pain. Behavioral vs. risk-based explanations for factors (Priority: 4/5): Asness says factors like value and momentum can be justified by both behavioral mispricing and risk premia, and implementation often barely changes depending on which story you prefer. Factor timing, diversification, and portfolio construction (Priority: 5/5): He cautions against style timing, supports tilting modestly toward extremes, and argues that value should be combined with other factors like momentum, profitability, and low risk. Size factor skepticism (Priority: 3/5): Asness is skeptical that small caps outperform purely because of size; he thinks much of the effect is explained by market beta and data issues, though small can still help factor investors. Alpha, passive investing, and 60/40 portfolios (Priority: 4/5): He argues alpha may be harder to find in traditional terms but not absent, that passive growth doesn’t eliminate mispricing, and that 60/40 is not dead though it likely faces lower forward returns. Communication, client behavior, and investing analogies (Priority: 4/5): He emphasizes that a good process is necessary but not sufficient; communication, education, and empathy help investors endure inevitable underperformance, illustrated with hockey goalie-pull analogies.

Key Arguments: Markets are not perfectly efficient, but they are efficient enough that easy profits are rare; Asness is closer to the middle than to pure Fama or behavioral extremes. Value can underperform for long stretches without being broken; recent weakness may actually indicate higher expected returns if valuation spreads are wide. A factor can be justified by both rational risk and behavioral mispricing; investors do not need to settle the theory perfectly to implement it well. Style timing is extremely difficult; investors should generally avoid moving in and out of value, momentum, and other factors based on recent performance. Value should be used as part of a multi-factor approach rather than in isolation, because profitability, momentum, and low-risk signals can help when pure value is weak. The size effect is weaker than originally thought once survivorship, delisting bias, and hidden beta exposure are considered. Alpha is harder to find than in the past in some areas, but mispricings still exist; a move toward passive may even create more opportunity, not less. A good investment process is the first requirement for success, but communication is what helps clients stick with it through bad periods.

Data Points: AQR assets under management: $186 billion - Described as the size of AQR, Cliff Asness’s firm. Number of PhDs at AQR: Over 80 - Mentioned when discussing AQR’s research depth and staffing. Long-term stock market Sharpe ratio: About 0.4 - Used to illustrate that even strong long-run strategies can have long bad stretches. Value factor drought cited: Last 8 to 10 years - Asness references the recent underperformance period for value investing. Duration of worst recent period for the firm: About 2 years - He says the firm’s longest recent difficulty has been about two years, though value itself has struggled longer. Suggested hockey goalie pull timing: About 5.5 minutes left - From the 2018 paper on when a trailing hockey team should pull its goalie. Suggested goalie pull when down by two: About 11 minutes left - He notes the optimal decision can be much earlier than intuition suggests. Tech bubble comparison: Late 1990s / 2000 - He says current expensive stocks are not as absurd as the dot-com era, and valuation spreads were wider then. Family detail: Four children, including two sets of twins born 18 months apart - Used in his personal definition of success. Rangers Stanley Cup drought reference: 54 years (1940 to 1994) and now about 26 years since 1994 - He uses this as a personal sports goal and success marker.

Pivotal Quotes: "Market efficiency is simply the idea that prices reflect all information." — Cliff Asness: His opening definition of market efficiency and baseline for the rest of the discussion. "We think market timing and style timing, moving in and out of things like value, momentum, low beta, size, is very hard to do." — Cliff Asness: Explaining why AQR describes tactical moves as an investing sin, while allowing modest tilts at extremes. "You have to keep an open mind, but you have to remember that your mind cannot be so open that your brains fall out." — Cliff Asness: His warning against dismissing value or other factors too quickly when narratives change.

Implications: For listeners, the message is to stay disciplined, diversify across factors, and expect long drawdowns. For the industry, it reinforces that solid process plus communication matter as much as raw research, especially when popular narratives challenge long-term evidence.