Flirting with Models

Cliff Asness - "...But Not So Open Your Mind Falls Out" (S3E13)

Jul 29, 2020
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ANECDOTE

AQR's Brutal Baptism In 1998 Markets

  • AQR launched in 1998 into turbulent markets and suffered large early drawdowns that tested their conviction.
  • Cliff recalls starting after LTCM, an initial up month, then 18 of first 19 months losing money, teaching the pain of sticking with a process.
ADVICE

Keep An Open Mind But Not So Open Your Brain Falls Out

  • Keep an open mind but not so open that your brain falls out; examine whether established premiums still make sense without trashing long-term evidence.
  • Test rigorously and only change conviction when out-of-sample evidence and logic justify it, because sticking earns the premium over time.
ANECDOTE

Unpublished Early Papers On Bubbles And Industry Value

  • Cliff described two unpublished early papers: Bubble Logic (mid-99 to 2000) and an industry-vs-within-industry factors study from 1994.
  • The industry-segmentation result showed most value returns came from within-industry re-ranking, but publication delays left it underappreciated.
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