The Epsilon Theory Archive

“History doesn’t repeat itself, but it often rhymes.” Mark Twain said that, or Abraham Lincoln depending on what corner of the internet you find yourself on any given day. Likewise, there are common themes, topics and subjects that run throughout the Epsilon Theory archive. All of our writing is categorized, tagged and organized to be easily accessible, but beware: your search for truth on one matter may very well lead you down any number of rabbit holes (and we hope that it does).


Choose one or multiple criteria to find just the posts you want:


It Was You, Charley

Value still works in markets warped by the Three-Body Problem, but works differently. Required reading for anyone puzzled by value's underperformance over the past NINE YEARS. Read more »


Archetypes are everywhere in markets. In part two of why investor behavior is one of the Things that Matter, Rusty expands on the tendency for the temperament and behaviors of investors to coalesce around archetypes. Read more »


We’d like to believe that information and analysis can tell us the true value of something but the reality is that investment returns are always and everywhere a behavioral phenomenon. Read more »


What can a bird teach us about value investing? To everything there is a season. Read more »

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