ETF overlap tool: how much do your funds overlap?
How much do US equity ETFs overlap? As of October 28, 2026, ETF Copilot finds 601 pairs more than 90% identical and 57 pairs more than 99% identical among 914,628 possible pairs. IVV and VOO share 96% of their weight. Overlap is the share of two funds' money that lands in the same companies.
How much of the ETF market is duplicated
- 1,367 funds we track
- 914,628 possible pairs
- 601 pairs more than 90% identical
- 57 pairs more than 99% identical
Effectively the same fund
Both directions above ~95%.
| Pair | First in second | Second in first | Shared weight |
|---|---|---|---|
| IVV vs VOO | 100% | 100% | 96% |
| IVV vs SPY | 100% | 100% | 100% |
| SPY vs VOO | 100% | 100% | 96% |
| IVV vs SPYM | 100% | 100% | 100% |
| SPYM vs SPY | 100% | 100% | 100% |
| SPYM vs VOO | 100% | 100% | 96% |
One sits inside the other
A wide gap between the two directions.
| Pair | First in second | Second in first | Shared weight |
|---|---|---|---|
| IVV vs QQQ | 54% | 93% | 54% |
| QQQ vs SPY | 93% | 54% | 54% |
| QQQ vs VOO | 93% | 56% | 56% |
| QQQ vs VTI | 96% | 50% | 50% |
| IVV vs VUG | 57% | 98% | 57% |
| SPY vs VUG | 57% | 98% | 57% |
Less alike than they look
Same category, genuinely different holdings.
| Pair | First in second | Second in first | Shared weight |
|---|---|---|---|
| QQQ vs VGT | 56% | 79% | 54% |
| IJH vs VO | 0% | 1% | 0% |
| SCHD vs VIG | 57% | 15% | 15% |
| QQQM vs VGT | 56% | 79% | 54% |
| IJR vs VB | 86% | 19% | 19% |
| IJR vs IWM | 83% | 48% | 48% |
Potential diversifiers
Popular funds with little shared weight.
| Pair | First in second | Second in first | Shared weight |
|---|---|---|---|
| VTI vs VXUS | 0% | 0% | 0% |
| VEA vs VOO | 0% | 0% | 0% |
| IEFA vs IVV | 0% | 0% | 0% |
| VTV vs VUG | 2% | 2% | 2% |
| QQQ vs VO | 9% | 18% | 9% |
| SPY vs VB | 3% | 24% | 3% |
What holdings overlap means
- Shared weight is the portion of both portfolios allocated to the same companies.
- “A in B” measures how much of Fund A is present in Fund B; “B in A” measures the reverse. These two directional figures are ETF Copilot Redundancy Scores — the share of one fund's money already sitting inside the other.
- The two percentages can differ because the funds have different position weights and breadth.
Updated October 28, 2026. Computed across all holdings, not the top 10.
Cite this
ETF Copilot, “Holdings overlap across 1,367 US equity ETFs”, as of October 28, 2026.
https://etf-copilot.com/overlap