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    Size a hedge for a portfolio or position

    Calculate how much of an index ETF or future offsets a portfolio's market exposure using beta-adjusted notional, and what it costs.

    How large should a hedge be to offset my market exposure?

    A beta hedge sizes the short so its dollar sensitivity matches the portfolio's. Hedge notional = portfolio value × portfolio beta × hedge ratio ÷ hedge instrument beta. Dividing by the instrument price gives shares or contracts.

    What you see in Market Ontology

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    Portfolio Hedge Sizing screen in Market Ontology
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    What opens after checkout

    Inverse-ETF hedge sizing with assumptions and reviewed order continuation, built from the details above and saved to your account in Capital Command.

    You get
    Inverse-ETF hedge sizing with assumptions and reviewed order continuation
    Opens in
    Capital Command
    Built from
    Holdings, exposure reduction, horizon
    Orders
    None; nothing is sent on your behalf

    Method

    • — Portfolio beta = value-weighted average of position betas versus the chosen index.
    • — Hedge notional = value × beta × target hedge ratio (e.g. 50% or 100%).
    • — Units = notional ÷ (price × multiplier) for futures or ÷ price for ETFs.

    Limits

    Beta is estimated from history and changes; a beta hedge removes market moves, not stock-specific risk.

    Updated 2026-10-15

    Questions

    Should I hedge with puts or a short ETF?
    A short position offsets gains and losses symmetrically; puts cap downside for a premium. Compare both in options strategy comparison.