Sector Benchmark Comparator
Compare your portfolio sector weights against S&P 500 benchmark allocations: see where you're over or underweight.
Sector
Delta
How It Works
Enter your portfolio's percentage allocation for each of the 11 GICS sectors. The tool compares your weights against the S&P 500 benchmark weights, which are pre-filled for reference. Leave a sector at 0% if you have no exposure there.
For each sector, the tool computes the delta (portfolio − benchmark) and classifies it as overweight, underweight, or neutral. It then calculates your active share: a single number quantifying how much your portfolio deviates from the benchmark.
FAQ
What is a sector benchmark comparator?
A sector benchmark comparator shows how your portfolio's sector weights compare to a benchmark index like the S&P 500. By entering your portfolio's allocation across 11 GICS sectors, you can instantly see where you are overweight or underweight.
What is Active Share and how is it calculated?
Active share measures how much your portfolio differs from the benchmark. It is calculated as half the sum of absolute deltas across all sectors. The score ranges from 0 (exactly matching the benchmark) to 100 (completely different).
How do I interpret the delta values?
A delta above +2% means your portfolio is overweight in that sector relative to the benchmark. A delta below −2% means you are underweight. Deltas between −2% and +2% are considered neutral (close to the benchmark weighting).
What is a good active share score?
An active share of 0 means your portfolio perfectly mirrors the benchmark. A score of 20, 40 is typical for diversified active funds. A score above 60 indicates a highly concentrated or non-benchmark-aware portfolio.
Are the benchmark weights accurate?
The benchmark weights in this tool approximate the S&P 500 GICS sector breakdown. These weights drift slowly over time due to market movements. The current defaults are reasonable approximations for comparing your portfolio against the US large-cap market.
Related Tools
Related portfolio tools: ETF Overlap Detector, Portfolio Temperature, Yield on Cost Tracker, Portfolio Rebalancer.