Holdings overlap measures how much two funds own the same stocks. FundVersus adds up, for every stock both funds hold, the smaller of its two weights. The result runs from 0% (nothing in common) to 100% (identical portfolios).
Examples from the current data
- VOO vs SPY: both track the S&P 500, and their stock portfolios overlap by 99.7% across 503 shared positions.
- QQQ vs QQQM: both track the Nasdaq-100 and overlap by 97.6%.
- VYM vs SCHD: two dividend ETFs with different selection rules overlap by 19.1%, across 83 shared stocks.
Each figure comes from the comparison page linked alongside it.
Why weights matter
Counting shared stocks alone can mislead. Two funds can share 80 names but put very different amounts in them. Using the smaller weight counts only the part of each position both funds actually hold.
Where the data comes from
Holdings come from each fund's latest public Form N-PORT report. The SEC releases those about 60 days after each quarter ends, so overlap reflects holdings a few months back. Check any two funds with the overlap tool.