Refusing to measure your results against someone else's returns, because envy is the one sin that has never once made anyone happier.
Munger has argued, across several talks, that envy rather than greed is what actually drives most destructive financial behavior — greed at least gets you something, but envy over another investor's returns gets you nothing except the temptation to abandon your own discipline and copy theirs at exactly the wrong moment.
A neighbor, a headline, or a friend's portfolio suddenly makes your own steady progress feel slow and unimpressive.
Instead of evaluating an opportunity on its own merits, you evaluate it against the fear of being left behind.
Capital moves outside the circle of competence, into whatever is currently working for someone else, usually late.
Buffett and Munger were publicly criticized for missing the late-1990s technology rally by staying within their circle of competence, only to be vindicated when the bubble collapsed in 2000 — a well-documented example of resisting envy-driven pressure to chase.
Munger and Buffett have publicly declined to chase speculative crypto assets and other high-flying trends despite public attention and other investors' outsized short-term gains, choosing to stay within businesses they can actually analyze.
The collapse of the hedge fund LTCM followed years of investors and institutions chasing the same sophisticated, highly leveraged strategies that had worked spectacularly for others — a widely studied cautionary example of performance-envy driving systemic risk.
Define success by your own hurdle rate and goals, not by comparing headlines to your neighbor's.
Remember that missing a winner costs you nothing real, while a rushed copycat bet can cost real capital.
Review your own decisions based on the process used, not on how they compare to someone else's outcome.
Treat media narratives about who is "beating the market" as entertainment, not as investment guidance.
It's not greed that drives the world, but envy — and envy, unlike almost every other vice, has never once made the person who feels it better off.