Value at Risk Calculator
Calculate Value at Risk and Conditional VaR for your portfolio. Estimate maximum potential loss at different confiden...
What Value at Risk Calculator does
The Value at Risk Calculator helps investors estimate the maximum potential loss their portfolio could face on a bad day, along with the expected depth of that loss if it occurs. By inputting portfolio value, volatility, and a chosen confidence level, users receive parametric VaR and CVaR figures for horizons ranging from one day to custom timeframes. The tool translates statistical volatility into concrete dollar amounts, showing how confidence levels directly affect the size of the estimated loss. What distinguishes this Financial Toolset version is its multi-confidence-level interface, offering selections of 90%, 95%, 99%, and 99.5% alongside a configurable time horizon. While many VaR tools require manual z-score lookups or fixed formulas, this calculator displays the underlying z-scores (1.65 at 95%, 2.33 at 99%) and provides a live preview of how each setting shifts the loss estimate. The side-by-side comparison of confidence levels and the clear explanation of the three required inputs—portfolio value, volatility, and confidence—make the statistical mechanics transparent without demanding prior expertise.
How to use the Financial Toolset Value at Risk Calculator
- 1
Enter your portfolio's current value in dollars
- 2
Input the historical standard deviation (volatility) percentage of your portfolio's returns
- 3
Select your desired confidence level from 90%, 95%, 99%, or 99.5%
- 4
Set the time horizon in days for the risk calculation
- 5
Review the resulting VaR and CVaR figures showing worst-day loss and expected shortfall
Best for
Portfolio managers and individual investors who need a quick, transparent estimate of downside risk without building complex models, particularly those comparing how different confidence levels affect potential losses.
Limitations
- Relies on historical volatility as the primary risk driver, which may not capture sudden market structural changes
- Assumes returns follow a normal distribution, potentially underestimating tail risk in volatile or skewed portfolios
- Output is an estimate based on user-provided inputs; actual market losses may differ materially
Value at Risk Calculator FAQ
- What confidence level should I choose for my VaR calculation?
- Higher confidence levels produce larger loss estimates. A 95% VaR means you expect to stay under that loss 95% of the time, while 99% provides a more conservative figure for risk-averse portfolios or regulatory compliance.
- How does volatility affect the Value at Risk result?
- Volatility, measured as the standard deviation of historical returns, directly scales the VaR estimate. A portfolio with 1.2% daily volatility will show a larger worst-day loss than one with 0.4% volatility, all else being equal.
- Can I use this calculator for portfolios with non-standard assets?
- The tool works with any portfolio where you can estimate a historical standard deviation of returns. For assets with thin trading history or non-normal return distributions, the results should be treated as approximations rather than precise predictions.
- What is the difference between VaR and CVaR shown by this calculator?
- VaR gives the single loss threshold at your chosen confidence level, while CVaR (Conditional Value at Risk, also called Expected Shortfall) estimates the average loss that occurs if the worst-case scenario actually happens, typically resulting in a larger number than VaR alone.
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