Weighted Calculation
Each asset beta is multiplied by its share of the total portfolio before all contributions are added together.
Investment Risk Analysis Tool
Portfolio Beta Calculator
Calculate the weighted beta of your investment portfolio and see how sensitive your holdings may be to movements in the overall market.
Calculate Portfolio Beta
Enter each investment's weight and beta value.
Portfolio weights should normally total 100%. You may also enter dollar
values instead of percentages. The calculator will automatically normalize
them before calculating the portfolio beta.
| Investment Name | Weight or Value | Asset Beta | Beta Contribution | Remove |
|---|---|---|---|---|
| 0.480 | ||||
| 0.298 | ||||
| 0.363 |
Portfolio Beta
1.14
Above-Market Volatility
Your portfolio is more volatile than the market
A beta above 1.00 suggests that your portfolio may experience larger price movements than the broader market.
Total Assets
3
Total Weight
100.00
Market Sensitivity
114%
Low
Market Beta
High
Calculation used:
Portfolio Beta = Σ (Asset Weight × Asset Beta)
What Is a Portfolio Beta Calculator?
A Portfolio Beta Calculator estimates how sensitive an investment portfolio may be to movements in a broad market benchmark. It combines the beta of each investment with its proportional weight in the portfolio.
Beta is a measure of systematic risk. This is the portion of investment risk linked to overall market movements rather than company-specific events. A portfolio beta can help investors understand whether their combined holdings are generally more defensive, market-like, or aggressive.
Risk Interpretation
The result explains whether the portfolio may move less than, close to, or more than the overall market.
Flexible Inputs
Enter allocation percentages, investment amounts, or any other consistent portfolio values. The tool normalizes them automatically.
How to Use the Portfolio Beta Calculator
You only need the value or allocation of each investment and its individual beta. Follow these steps to calculate your portfolio's weighted beta.
1
Enter Each Investment
Add a name for every stock, fund, ETF, or other market-sensitive investment included in your portfolio.
2
Add Weight or Value
Enter either the percentage allocation or the monetary value of each investment. Use the same format for every row.
3
Enter Asset Beta
Add the published or calculated beta for each investment. Beta values can be positive, zero, or negative.
4
Add More Assets
Select “Add Investment” when your portfolio contains more than the three default rows.
5
Calculate the Result
Select “Calculate Beta” to see the portfolio beta, market sensitivity, total assets, and risk interpretation.
6
Review Your Risk
Compare the result with a market beta of 1.00 to understand the portfolio's relative sensitivity.
Portfolio Beta Formula
Portfolio beta is calculated by multiplying each investment's beta by its portfolio weight and then adding the weighted beta values together.
Formula:
βp = (w₁ × β₁) + (w₂ × β₂) + ... + (wₙ × βₙ)
In the formula, βp represents portfolio beta, w represents the proportional weight of an asset, and β represents the beta of that asset.
| Investment | Portfolio Weight | Asset Beta | Weighted Contribution |
|---|---|---|---|
| Stock A | 40% | 1.20 | 0.40 × 1.20 = 0.480 |
| Stock B | 35% | 0.85 | 0.35 × 0.85 = 0.298 |
| Stock C | 25% | 1.45 | 0.25 × 1.45 = 0.363 |
| Portfolio Beta | 1.141 | ||
A portfolio beta of approximately 1.14 suggests that the portfolio may move
about 14% more than the market, assuming the historical beta relationship
continues.
What Does Your Portfolio Beta Mean?
Beta Below 0
A negative beta indicates that the portfolio may historically move in the opposite direction from the market.
Beta Near 0
The portfolio may have limited sensitivity to broad market movements, although other risks can still affect its value.
Beta Between 0 and 1
The portfolio is generally less volatile than the market and may be considered relatively defensive.
Beta Near 1
The portfolio may move at approximately the same rate and in the same direction as its market benchmark.
Beta Above 1
The portfolio may experience larger movements than the market, creating higher potential volatility.
Very High Beta
A beta significantly above 1 may indicate an aggressive portfolio with greater sensitivity to market gains and losses.
Frequently Asked Questions
There is no single ideal beta for every investor. A lower beta may suit conservative investors who prioritize stability, while a higher beta may suit investors who accept more volatility in pursuit of greater potential returns.
Percentage allocations normally total 100%. However, this calculator also accepts investment values, such as 5,000 and 10,000. It converts each value into a proportional weight automatically.
Yes. A negative beta suggests that an asset has historically tended to move in the opposite direction from the selected market benchmark. Negative beta assets are uncommon and the relationship can change.
No. Beta measures historical sensitivity to market movements, not a guaranteed return. A high-beta investment can rise more during strong markets, but it can also fall more during market declines.
Beta values are commonly available on financial research platforms, brokerage dashboards, stock profile pages, and market data services. Values may differ because providers can use different benchmarks and historical periods.
Recalculate after major portfolio changes, significant price movements, rebalancing, or updated beta estimates. Regular reviews can help keep your risk assessment aligned with your current holdings.
Beta mainly measures systematic market risk. It does not fully represent company-specific risk, liquidity risk, credit risk, concentration risk, or the possibility of permanent capital loss.
Disclaimer: This calculator is provided for educational and
informational purposes only. Beta is based on historical relationships and does
not predict future returns or losses. Investment decisions should consider your
objectives, time horizon, financial position, and risk tolerance.