Correlation and Portfolio Construction
How correlated positions affect total portfolio risk, the difference between name-level and market-level correlation, and the journal's rules for basket exposure and concentration limits.
Expected Value — The Math Behind Every Trade
The expected value formula for options trades, how the journal calculates probability of profit, the difference between theoretical and realized expected value, and why a positive EV is necessary but not sufficient.
The Greeks — Delta, Gamma, Theta, Vega, Rho
The five option greeks: delta, gamma, theta, vega, rho — what each measures, how they interact in a position, and the greeks the journal monitors at entry and during the life of the position.
Implied Volatility — The Price of Optionality
What implied volatility is, how it differs from realized volatility, why the option's price is dominated by IV rather than the underlying's expected move, and how the journal uses IV rank to choose structures.
Options Market Microstructure — How the Bid/Ask and the Open Interest Shape the Trade
The microstructure of the options market: bid/ask spreads, open interest, volume, and the way the interaction of the order book shapes the journal's entry and exit prices. The hidden cost of every trade that the price doesn't show.
Options vs. Equity Trading — Why the Journal Focuses on Options
The structural differences between options trading and equity trading: leverage, time decay, defined risk, and the ways the differences shape the journal's methodology. Why the journal focuses on options and how the focus changes the strategy.
Reading the Trade Log — How to Evaluate the Journal's Methodology
How to read the trade log: filtering by structure, by ticker, by outcome; the difference between hit rate and expected value; and the patterns to look for when evaluating the journal's methodology.
Statistical Foundation — Why the Math Works
The statistical foundation of the journal's methodology: the normal distribution, the central limit theorem, the law of large numbers, and how each applies to the realized outcomes of the playbook's structures.
Volatility as an Asset Class — Why VIX and Realized Vol Behave Differently
The fundamental difference between implied volatility and realized volatility, why VIX is a forward-looking measure of expected risk, and how the journal uses the realized-vs-implied gap to identify edge in the options market.
Long Call Condor Strike Selection: How to Pick the Body Width
The decision tree for choosing a long call condor's body width: 85 points vs 110 vs 130 vs 200. Why three different bodies were used on the same underlying in one trading session. A rule-based selection framework that maps regime and thesis to strike geometry.
Common Options Math Errors I Make (and How I Catch Them)
Two recurring math errors in options-spread writing: the long call condor max-profit formula and the OptionStrat basis vs live yfinance discrepancy. Both shipped live before being caught. The derivations, the live examples, and the verification routines that catch them next time.
QQQ Call Skew: How to Read It and Trade It
Why QQQ has more call skew than SPX, how to measure call skew from a live option chain, when skew widens (and when it compresses), and how the long call condor trades it. Includes the live IV surface from three July 23 trades as case studies.
Risk vs Reward: The Asymmetry That Drives Every Trade
The expected-value math behind every trade, why a 2:1 reward-to-risk ratio is the floor not the goal, and how to think about positive expectancy when the win rate is below 50%.
Market Probabilities: How to Think About Strike Odds
Why option-implied probabilities and historical probabilities are different, the difference between risk-neutral and real-world probabilities, and how to use probability of profit (POP) without over-relying on it.
Standard Deviations in Options Trading: The Math of 'One-Sigma Moves'
What one, two, and three-sigma moves actually mean for SPX positioning, how implied vol maps to expected moves, and why the strike selection in a spread book should be sigma-anchored not delta-anchored.