Data & methodology
Questions worth answering precisely.
A concise reference for what the product measures, which assumptions it makes and where its conclusions stop.
What does holdings coverage mean?
Coverage is the sum of the weights present in a fund holdings file. A 62% file represents 62 percentage points of fund weight; EigenDex does not stretch those positions to 100%. Coverage below 95% is marked as partial.
Why can overlap appear as a range?
The lower bound is the weighted intersection that can be proven from reported positions. The upper bound adds only the smaller missing portion of the two funds. That upper value expresses uncertainty, not an estimate that the missing holdings actually match.
How is known holdings overlap calculated?
For every security reported in both funds, EigenDex takes the smaller of the two reported weights and adds those minimum weights. The calculation remains on the issuer-reported scale.
How does Portfolio X-Ray handle several ETFs?
Each fund holding weight is multiplied by that ETF’s allocation in the portfolio. Matching securities are then aggregated across funds. Missing holdings weight remains visible as unrepresented exposure.
What prices are used for performance?
Historical analytics use the adjusted-close observations in the local market-price dataset. Every report shows the latest available observation; historical data remains usable even when it is not current enough for a live quote.
What does the correlation matrix report?
It reports Pearson correlation between date-aligned daily adjusted-close returns over the selected rolling window. The displayed value is the latest window, not an average of many overlapping windows.
How are backtest contributions treated?
Monthly deposits increase portfolio value and invested capital, but they do not count as return. EigenDex reports time-weighted performance and calculates drawdown from a unitized wealth index.
What costs does the backtester include?
Adjusted prices already reflect distributions, splits and the fund-level economics embedded by the data source. You can add an explicit annual drag for advisory or trading costs. Taxes and bid/ask spreads are not modeled.
Are monitoring rules background alerts?
Not yet. Current rules are stored in your browser and evaluated against available snapshots when the monitoring page opens. The interface does not claim email, push delivery or a guaranteed data-refresh schedule.
Does EigenDex recommend a fund or portfolio?
No. EigenDex exposes reported holdings and historical calculations. It does not assign winners, optimize an allocation or account for your taxes, liquidity needs, jurisdiction or risk capacity.