Your Own Worst Enemy
The market can't hurt you. You can. Ten moments, one enemy — the one making the decisions.
The brief
No terminal, no numbers to crunch — just you, living through one full market cycle: a calm melt-up, a mania, a crash, a recovery. At each turn your own mind hands you an impulse — the move that feels obviously right and is quietly wrong. A disciplined 'plan' investor rides the cycle without flinching; every time you act on a feeling, your path diverges from theirs, and that gap is the whole game. The right move almost always feels wrong: do nothing while everyone's getting rich, hold while your portfolio halves, buy back the day after you swore off stocks. Notice the feeling. Overrule it. Every bias of the course, one cycle.
How you play it
Ten moments that test your nerve, each choice plotted against what the market actually did.
The job: Private Investor — Managing your own capital in public markets, where the research is free, the fees are near zero, and the only remaining adversary is the person making the decisions.
What a private investor actually does →What you're judged on
Every decision is marked to market server-side. These are the meters that move — run one to zero and the simulation ends there.
What it tests
No trivia — the simulation only asks what the chair actually has to know.
Where you learn this
Your Own Worst Enemy is the finale of Mind Over Markets, waiting past Level 24 — Final Boss: Diagnose the Bias. You can sit down right now and find out how much of it you already know; the course is there for the parts you don't.
Play Mind Over Markets →Other chairs
The Weekend
Sixty-two hours to Tokyo's open. You cannot save everyone — and one of them you cannot lose.
The Structurer
Every note is a bond plus options. Pick the wrong shape and the client finds out at maturity.
The President
Every policy has two halves: what you do, and who pays. The bond market grades the second one.
The First Year
Twelve months on your own. No perfect month — only wiser and poorer ones.
The Newsroom
One shift on the data desk. Every story is a stats trap in disguise.
Mission Control
No options to pick — do the math, key in the number, bring them home.
The Policy Chair
You are the central bank. One rate, every quarter, a whole economy on the line.
The CFO's Chair
You run the firm's capital. Ten board meetings, one question every time: where does the cash go?
The Pit
You run the book. The tape moves, the Greeks bite, margin is real. Survive the session.
The Desk
Run a derivatives desk for one week — it does not stay calm.
Rotation Day
Ten desks, one stack of cards each. Sort them right — and never, ever misfile ethics.
The Expert Witness
Ten regression tables enter evidence. The significant one is usually the trap.
The War Room
The VaR says you're fine. The tail says otherwise. Ten audits — read which one is lying.