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Portfolio Beta

Your win rate tells you how you've traded. It tells you nothing about how exposed you are right now. Portfolio beta reads how much market your book is carrying — stocks and options measured separately, index options included, with your beta-weighted exposure beside them.

See Your Portfolio Beta

Free · Nothing to configure · Reads what you've already recorded

Two Separate Reads, Not One Blended Number

Stocks and options are measured separately, and deliberately so. Share weights are solid: shares times mark. Option weights need delta-adjusted notional, and delta is an optional field.

Blending the two into one authoritative figure would launder a confident-looking number out of a soft input. So you get both, each with its own coverage count, plus an approximate combined figure that says so on its face.

The Working, One Click Away

Beta is easy to quote and easy to misuse, so the headline figure opens into its parts: the stock side, the options side, the combined total, and what that total is worth in equivalent index-ETF shares.

Coverage is stated rather than assumed — you can see how much of the book each figure actually covers. For the full derivation, we wrote a separate piece on how beta is calculated: the weights, the lookback, and where a single portfolio-wide figure stops being meaningful.

Index Options Count Too

A cash-settled index position carries real market exposure, so leaving it out of the total would flatter the number. Index roots contribute through curated proxies instead of vanishing.

Every supported root carries either a proxy or a stated reason it has none. Nothing gets a silent stand-in. The same handling is why the options journal treats index contracts as cash-settled everywhere else.

Exposure Beside the Sensitivity

Beta tells you how sharply your book reacts. Beta-weighted exposure tells you how big the thing reacting is — the market you're actually facing across shares and contracts together, in equivalent index-ETF shares.

It sits on the performance dashboard next to capital deployed, so the question “how much am I risking?” and the question “how much market am I carrying?” get answered in the same glance.

Know what you're carrying

No credit card required. Portfolio beta reads the positions you've already recorded — there's nothing to set up.

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Frequently Asked Questions

What is portfolio beta?
It's a single read on how much market risk your book is carrying. Beta measures how much a holding tends to move when the market moves — near 1 tracks it, above 1 amplifies, below 1 damps. Rolled up across what you hold, it tells you whether a bad week would graze your account or take a chunk out of it.
Why are stocks and options measured separately?
Share weights are solid — shares times mark. Option weights need delta-adjusted notional, and delta is an optional field, so blending the two into one authoritative figure would launder a confident-looking number out of a soft input. You get both reads with their own coverage, plus a combined figure clearly marked approximate.
How is beta calculated?
From daily returns against SPY over roughly the last year, as the covariance of the two return series divided by the benchmark's variance. A ticker needs at least 120 paired daily returns — about six months of sessions — before it reports a beta, so recent listings drop out rather than contributing a noisy estimate.
Are index options included?
Yes, through curated proxies. A cash-settled index position contributes real exposure instead of vanishing from the total. Each supported index root carries either a beta proxy or a stated reason it has none, so nothing is silently assumed.
What is beta-weighted exposure?
How much market you're actually facing across shares and contracts together, expressed as an equivalent in index-ETF shares. It's often the more sobering of the two numbers: beta tells you the sensitivity, exposure tells you the size that sensitivity applies to.
Do I need anything from my broker for this?
No. Portfolio beta reads what you've already recorded — your open positions and their marks. Prices come from the quote feed. Options contribute more precisely when you've recorded delta, and the coverage counts tell you how much of the book each figure actually covers.

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