Covered calls. Cash-secured puts. The wheel. Black-Scholes Greeks. Free. Fast. In your browser. With assignment-risk warnings the other guys forgot.
Every tool runs locally in your browser. Type a ticker, get an answer. Optional broker-data sync via Polygon or Tradier.
Annualized yield, downside cushion, if-called return, and explicit early-assignment warnings around ex-dividend dates.
Run it →Cash at risk, premium yield, annualized return on capital, effective cost basis if assigned, breakeven.
Run it →Log every CSP, assignment, covered call and exit. Cumulative premium, realised P&L, true wheel yield.
Run it →Theoretical price, delta, gamma, theta, vega, rho. Solve for implied volatility. Interactive sensitivity charts.
Run it →Type a ticker — see every covered call and CSP strike ranked by annualized yield. Live data.
Run it →Top covered-call and CSP yields across SPY, QQQ, AAPL, NVDA, TSLA and 25 more — refreshed every 5 minutes.
Open dashboard →Save tickers; we'll keep live prices and best-yield strikes refreshing automatically.
Open watchlist →A live preview of the highest annualized covered-call yields across the most liquid optionable US tickers. Refreshes every 5 minutes.
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No signup. No login. Open the page, type a ticker, see the math. Works on mobile.
API keys and trade history live in your browser's localStorage. We never see them.
We flag early-assignment risk around ex-dividend dates — the one thing every other calculator misses.
Interactive payoff diagrams, Greek sensitivity curves, and explainer animations on every page.
Annualized yield = (Premium ÷ Cost basis) × (365 ÷ Days to expiration). Our calculator also produces an if-called annualized return that bakes in any upside to the strike plus dividends received before expiration.
The wheel is a repeating cycle: sell a cash-secured put on a stock you'd be happy to own → if assigned, you own the shares → sell covered calls against those shares for additional premium → if called away, restart the cycle with another CSP. Our Wheel Tracker logs every leg and reports your realised return on capital across the full cycle.
By default the calculators ship with a built-in demo chain so they always render, even with no key configured. Connect your own Polygon.io or Tradier API key in the Settings panel of any calculator and the chain dropdown pulls live (or delayed) quotes. Keys stay in your browser; we never see them. For a production deploy where you want hosted keys, point the