Risk and Edge

### Options trading as a widget factory

Edge Functions: the hurdle for a trader's unit economics

Risk and Edge

Edge Functions: the hurdle for a trader's unit economics

Risk and Edge

Theta vs vega weighting

Options and Volatility

When are you an investor vs a trader?

Options and Volatility

The follow up to Breakpoints

Options and Volatility

Stepping thru my GME roll

Options and Volatility

Gridpoints on the vol surface

Options and Volatility

GME trade and more

Options and Volatility

Lessons of markets that rhyme

Options and Volatility

A tour of SPY skew in pictures

Options and Volatility

When event pricing hides extremely cheap trading day volatility

Options and Volatility

Thoughts about pricing 0DTEs that respect how volatility unfolds

Options and Volatility

A smattering of practical option tips

How Markets Work

On ETF and option market-making

Options Theory

Puzzles to build fundamental trading logic

Options and Volatility

Why all implied volatilities are "wrong"

Options and Volatility

Volatility is a quadratic drag on returns