See what the numbers are actually doing.
A small suite of interactive instruments for teaching and exploring finance. Build a derivatives position and watch its payoff take shape at maturity, or trace the identities that bind growth, reinvestment and returns together in a company valuation.
Portfolio Payoff Builder
Assemble a portfolio card by card — underlyings, futures, options and T-bills. A shareable link that opens straight into the plotter updates as you go.
Open the builder 02 · PlotterPortfolio Payoff Plotter
Render the combined payoff and profit/loss of a portfolio as a function of the underlying price at maturity, with a per-asset breakdown and live tooltips.
Open the plotter 03 · IdentitiesValuation Identities
Relationships that bind a valuation together — growth to reinvestment, returns to multiples, price back to the assumptions it requires. Enter your own estimates and see which ones hang together.
Open the identities