Techniques

Hold one stock and short the ETF that best offsets its market moves. Each ETF is fit on past prices, and the hedge is tested walk-forward after costs.

See what a protective put, collar, put spread or covered call pays at expiry. Only the option chain is fetched; the payoff and greeks are computed in your browser.

Size a set of positions from their trailing volatility in three ways: a volatility target for each name, inverse volatility weights, and equal risk contribution weights from the covariance matrix.

Find the stocks that have moved most closely with one ticker, from a pair up to a 10-name basket, or check a group you name. When the anchor drifts away from its partners, the readings below help you judge whether the gap is likely to close and where to cut it.