Blogs on options greeks and P&L attribution: Theta decay, Vega and implied volatility, strike selection, and reading what your positions actually did.
Why did my P&L move? Greek attribution, explained — Greek attribution splits a day of options P&L into Delta, Gamma, Theta and Vega, showing which forces actually produced the number your broker reports.
Why your P&L moved when the market didn't — Why an options position gains or loses when the underlying does not move: Vega, implied volatility shifts, and the second market inside every option price.
Theta decay: what the smooth curve hides — Real Theta decay is lumpier than the textbook curve: priced-out weekends, expiry-week acceleration, and moneyness effects that reshape what you collect.
Calendar spreads: how time becomes an asset — How calendar spreads turn time into an asset: sell fast front-month Theta, own slower back-month decay, and manage the Vega exposure that comes with it.
How to read a risk profile chart — How to read a risk profile chart: why the expiration payoff misleads, what the T+0 line shows, and how date slices reveal behavior well before expiry.
Five modeler mistakes that flatter your trade — Five ways a position modeler flatters your trade, from frozen volatility to endpoint thinking and ignored costs, plus how to ask it harder questions.
Choosing strikes with probability, not hope — Strike selection with probability instead of hope: what Delta approximates, how the expected move frames strikes, and balancing win rate against payoff.
What your broker's P&L number doesn't tell you — Two traders can report identical daily P&L for opposite reasons. What a broker net number hides, and why decomposing it by greek changes your decisions.