Everything quant,
in one place.
A live market monitor, 1,903 interview questions with worked solutions, 22 hands-on tools, and a library that goes deep. All free, because none of it should sit behind a paywall.
Right now the market is stressedvol 14.6%High Beta leading +1.0%see the monitor →Try it right now
No signup, nothing to install. Here are two of the site's tools, playable right on this page.
A fair coin is flipped until the first heads. What is the expected number of flips?
2. It is geometric with p = 1/2, so the expected count is 1/p = 2.
Flip 10 coins, count the heads, repeat. Watch the normal curve show up on its own.
Quote a two-sided market on two dice, then trade. Can you stay in the black?
Fair value is 7 (the average sum of two dice). Capture the spread, but quote too wide and nobody trades.
What's inside
Six parts of the site, each built to do one thing. Start wherever you like.
Factor weather, the market regime, how correlated things are, and the vol risk premium. Rebuilt every day.
Five questions a day, the same for everyone. Miss a day and the streak resets.
1,903 questions, every one worked out
Full solutions, not just answers. Filter by topic, company, or difficulty, or sit a timed mock.
From zero to desk-ready, in order
- 01Math foundationsProbability, linear algebra, calculus
- 02Statistics & inferenceEstimation, testing, regression
- 03Derivatives & volBlack-Scholes, the greeks, hedging
- 04Strategies & microstructureSignals, execution, market making
Quant knowledge shouldn't hide behind a paywall.
Most of it is locked up in expensive courses, prestige programs, and PDFs passed around in private. That always felt backwards to us, so we put the whole kit, the monitor, the questions, the games, and the library, in one place and made it free. It stays free.
A memo now and then
New strategies, concepts, and the occasional market note. No spam, unsubscribe in one click.
Have a look around.
Open the monitor, play a game, or take today's five questions. No account, no cost.