Valuation, returns, and risk.
Curated entry points into four calculator divisions: stocks, options, bonds, and portfolio risk. Click any card to open the calculator with the formula loaded, or jump to the whole division.
Stocks & Equity Valuation
Value individual stocks with multiples, dividend models, and cash-flow valuation. Translate growth and required-return assumptions into a fair-value range.
Two-Stage DCF Valuation
Value a business by discounting projected free cash flows plus a terminal value at WACC.
OpenEntry P/E Ratio
Maximum P/E to pay today given exit multiple, growth, and required return.
OpenTwo-Stage DDM
Dividend discount model for companies in growth-phase transition.
OpenGordon Growth Model
Price a stock from next year's dividend, the required return, and constant growth.
OpenOptions & Derivatives
Price European options with Black-Scholes-Merton, back out implied volatility from market prices, and evaluate premium-yield strategies.
Black-Scholes Call Price
Theoretical price of a European call given S, K, σ, r, and T.
OpenBlack-Scholes Put Price
Theoretical price of a European put under the same framework.
OpenImplied Volatility
Solve for the σ that makes BS price match the observed market option price.
OpenCash-Secured Put Return
Annualized premium yield on a cash-secured short put position.
OpenBonds & Fixed Income
Price coupon and zero-coupon bonds, compute yields, and measure rate sensitivity with duration and convexity.
Bond Price
Present value of coupons plus face value at the market yield.
OpenYield to Maturity (YTM)
The single discount rate that equates price to the bond's cash flows.
OpenModified Duration
Percentage price change for a one-point move in yield.
OpenBond-Equivalent Yield
Annualize a semiannual yield the way the bond market quotes it.
OpenPortfolio, Return & Risk
Judge a portfolio by return per unit of risk, and size the losses it could hand you.
Looking for the full toolkit: every dividend model and multiple, all the Greeks, the whole duration and convexity stack?
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