Playbook

How to build a paper portfolio (and why sharps do it)

Paper trading is not training wheels, it is how you prove an edge is real before you put real size behind it.

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The short version

Pick a theme, choose three to five markets with clean resolution rules, write down your probability and your reason for each, assign simulated size, then review why the price moved versus why you thought it would. The reps cost you nothing and the feedback is brutal and honest, which is the point.

Why it matters

Real money on a single market tells you almost nothing; variance drowns the signal. A tracked portfolio across many calls is the only way to find out if your edge is skill or noise. Do it on paper first and you get the whole feedback loop without paying tuition to the order book.

Starter portfolios

  • A three-market AI policy watchlist with hard deadlines
  • A macro calendar book: CPI, jobs, next FOMC
  • A mixed theme book you review every Sunday

How to run it

Theme coherenceGroup markets that share context so your updates transfer from one to the next.
Position sizingSize by conviction, not vibes. Bigger number means more edge, not more excitement.
Review cadenceReview weekly or on catalysts. A stale book teaches you nothing.
Outcome journalLog the starting price, your number, what changed, and the result. That is your edge, written down.

FAQ

Is paper trading just for people too scared to bet?

No. It is how you separate a real edge from a hot streak before variance punishes you for confusing them.

How many markets should I start with?

Three to five. Enough to learn from, few enough to actually track.

What goes in the journal?

Starting price, your probability, the one or two drivers that mattered, and the resolved outcome.