How is this calculated?

Each position's delta, contract count, underlying price, and beta to the chosen benchmark are combined into a benchmark-share-equivalent figure, then summed across every position entered. Multiplying the total by the benchmark price gives an estimated dollar exposure.

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What is my options portfolio’s beta-weighted delta against a benchmark like SPY?

Q: What is my options portfolio's beta-weighted delta against a benchmark like SPY?

For each position, beta-weighted delta equals delta per contract times 100 times contracts times (underlying price divided by benchmark price) times beta to the benchmark. Summed across positions, it estimates your combined directional exposure in benchmark-equivalent shares.

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Enter Your Positions

Beta is a value you look up or estimate yourself (many data providers publish it). This tool does not fetch it automatically.

Benchmark price, e.g. SPY ($)

Position 1

Delta per contract already signed for your position (e.g. -0.30 for a short call). Enter number of contracts as a positive whole number.

Position 2 (optional)

Delta per contract already signed for your position (e.g. -0.30 for a short call). Enter number of contracts as a positive whole number.

Position 3 (optional)

Delta per contract already signed for your position (e.g. -0.30 for a short call). Enter number of contracts as a positive whole number.

Position 4 (optional)

Delta per contract already signed for your position (e.g. -0.30 for a short call). Enter number of contracts as a positive whole number.

Your Result

Fill in the benchmark price and at least one position, then click Calculate to see your combined market exposure.

How this is calculated

For each position: beta-weighted delta equals delta per contract, multiplied by 100 shares per standard contract, multiplied by number of contracts, multiplied by (underlying price divided by benchmark price), multiplied by beta to the benchmark.
The total beta-weighted delta is the sum across all positions you enter, expressed as an equivalent number of benchmark shares (for example, SPY shares).
Total dollar exposure equals the total beta-weighted delta multiplied by the benchmark price, an estimate of what your combined options positions behave like in benchmark-equivalent dollars.
Enter each position's delta already signed for your actual position: a long call is positive, a long put is negative, and a short option flips the sign of that option's own delta.
Delta and beta are both estimates that change as the underlying price, time, and volatility change. This is a snapshot based on the numbers you enter, not a live or predictive feed.

Risk & liability disclaimer: This calculator produces a mathematical estimate based on the numbers you enter. It is not financial advice and does not guarantee any trading outcome. Trading involves risk of loss, and past results do not predict future results. Trading Habits is not a broker-dealer, registered investment adviser, or tax professional, and is not affiliated with any broker, exchange, or data provider. We do not guarantee this tool is error-free or suitable for your situation. Always verify results independently and consult a licensed professional before making any trading or financial decision. You could lose some or all of the capital you trade with.

What is my options portfolio’s beta-weighted delta against a benchmark like SPY?

Enter Your Positions

Your Result

How this is calculated

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