Portfolio Overlap
DIRECTSame-security holdings across the selected portfolios. To expand funds into ultimate underlyings, use LOOKTHROUGH exposure.
At Least 2 Portfolios Required
You currently have no portfolio loaded.
You need at least 2 portfolios in the active collection to run overlap analysis — the tool compares holdings across portfolios to surface shared positions and concentration risk.
- 1 Open the portfolio switcher in the top toolbar
- 2 Create or select a collection
- 3 Include 2 or more portfolios in it
How portfolio overlap is measured
DIRECT mode compares the exact ticker/security rows held by each selected portfolio; it does not expand a fund into the companies inside it. The position table sums market value and shares for a ticker across accounts, while retaining the account/portfolio contribution breakdown. Use LOOKTHROUGH mode for recursive fund-of-funds expansion.
The similarity heatmap is an unweighted ticker-set Jaccard measure:
|tickers A ∩ tickers B| ÷ |tickers A ∪ tickers B| × 100. It is intentionally
distinct from weighted fund overlap, which uses
Σ min(|weight A|, |weight B|) for same-direction shared securities and each
fund’s NAV (100%) as the denominator.
Using the comparison
A high overlap score is not automatically bad: deliberate duplication may reinforce a desired exposure. The result is most useful for finding concentration you did not intend, comparing replacement funds, and determining whether a new holding actually adds diversification.
Known limitations
Holdings disclosures arrive on different schedules and may omit derivatives, cash, shorts, or unsupported securities. Similar economic exposures can also appear under different instruments and may not register as identical holdings. Treat the output as a research estimate and verify important positions with current issuer disclosures.
Review both the percentage overlap and the names of the largest shared holdings. Two funds can have a modest overall score while still duplicating one position that matters to your risk plan, or a high score that is intentional because the funds serve different income roles.