The instincts that kept us alive on the savanna are precisely wrong for investing. Meet your opponent: you.
This track opens with an uncomfortable truth: in investing, your single biggest opponent isn’t the market, other traders, or bad luck — it’s you. More precisely, it’s the ancient wiring of your own brain, which is superbly tuned for survival and catastrophically wrong for markets.
The root of nearly every investing mistake is a
mismatch:
the instincts that kept our ancestors alive on the savanna are precisely the wrong ones for markets. On the savanna,
running with the herd meant safety (the one who didn’t flee got eaten) — in markets, following the herd makes you buy tops and sell bottoms.
Reacting instantly to danger saved your life — in markets, panic-selling a dip locks in losses.
Avoiding loss (a predator, a poison) was survival — in markets, loss-aversion makes you cut winners and cling to losers.
Seeing patterns in the grass spotted the tiger — in markets, it makes you find fake signals in random noise. These instincts are
fast, emotional, and automatic — they fire before your rational mind engages. So the entire study of
behavioural financeThe study of how psychology drives investing mistakes. (and this whole track) is really about
recognising your own hardwired biases and building systems to override them. You can’t delete the instincts, but you can
know your opponent — and the first step to beating a bias is being able to name it as it happens. The lessons ahead are a field guide to the specific ways your brain
willArranging how your wealth passes on after death. try to sabotage you.
- Your biggest opponent is you — ancient survival instincts misfire in markets.
- Herd instinct → buy tops/sell bottoms; panic reflex → sell dips; loss-avoidance → cut winners, hold losers; pattern-seeking → see fake signals in noise.
- These biases are fast, emotional, automatic — they fire before reason engages.
- The fix — recognise and name your biases, then build systems/rules to override them (the rest of this track).
ExampleDuring a crash, every instinct screams “sell, get to safety!” — the same impulse that made your ancestors flee a predator. But selling into the panic locks in losses and misses the recovery. The savanna-brain’s “correct” survival response is the market-investor’s catastrophic mistake. Recognising that’s your instinct talking is the first step to not obeying it.
Key takeawayIn investing your biggest opponent is your own brain: instincts tuned for savanna survival (herd-following, panic, loss-avoidance, pattern-seeking) misfire badly in markets, and they fire fast and automatically before reason engages. You can’t delete them — but you can learn to recognise and name your biases and build rules to override them.