using elementary school geometry to explain gamma

gamma p/l is the same as distance covered via acceleration

the dirties are down the cleans are up

On June 2nd I tweeted: June expiry in USO vol change on the 3% rally... OPEC agreed over the weekend to hike production...but you saw the Ukraine-Russia developments. Competing bullish/bearish effects Vol is lower today if you look at the June surface. But it's probably up

The "most important" gambling topic and a riddle

Non-self-weighting strategy

the investment industry is a placebo

Uselessly long feedback loops mean investing is an act of faith

Netting risk, “The Hopeless”, John Arnold and more

a wide smattering of finance nerdom

The variable that balances the buy/rent equation

You’ve solved one equation with one unknown a million times. For example: $20 - 2 * $8.99 = X where: X = how much change you are owed after handing over an Andrew Jackson for 2 hot dogs at Wrigley Field. In finance, this uneventful operation is dressed up with the

two vol trader interview questions

practice with volatility time

how I sold cotton at an all-time high

The cotton market as a unique example of when derivatives become the underlying

Our big TSLA covered call study

Selling covered calls in TSLA for the past 6 years

Options as LEGOs

How to explain options and put-call parity to absolute beginners

shortcuts to get implied vol from a straddle

more option math tricks

what the vol spread hides

how charts oversimplify