Paper Trading Before Real Money
Paper trading proves your order mechanics and leaves psychology untested. See what simulator fills omit, how long to practice, and which metrics matter.
#risk management
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Kelly Criterion Position Sizing, Measured
The Kelly criterion sets bet size from your edge. See what ten years of daily stock returns imply about full Kelly, drawdown, and half Kelly in practice.
The 3-5-7 Rule in Options, Examined
The 3-5-7 rule caps risk at 3% per trade, 5% per underlying and 7% of the account. Where the folk rule came from, and how it holds up against the data.
Protective Puts: Portfolio Insurance
A protective put is insurance for stock you already own. Watch one real SPY put hold a floor under a $75,000 position when the market fell in June 2026.