IVOO
US Mid CapVanguard S&P Mid-Cap 400 Index Fund ETF Shares
Vanguard · Tracks S&P MidCap 400 Index · Inception Sep 7, 2010
Trailing returns
through Oct 23, 2026- 1 year
- +13.5%
- 3 year
- +17.1%
- annualized
- 5 year
- +7.0%
- annualized
Price return from month-end closes, distributions reinvested at month end. Excludes trading costs, bid-ask spreads and taxes. Past performance says nothing about future returns and is not part of the composite score — see the methodology for what the score does measure.
Composite score
Based on a 0.070% expense ratio.
Based on $5.67B in net assets for the whole fund, all 2 share classes. Our sources don't report the ETF class alone.
Top-10 holdings represent 8.3% of net assets.
US Mid Cap base · ETF wrapper · 1.22% TTM yield.
Tracking error vs. the largest catalog peer tracking the same index. Not yet part of the composite — see methodology.
The composite is a weighted average of the four core sub-scores above (cost, tax efficiency, liquidity, concentration). Missing sub-scores fall back to the per-category median when the category has at least 50% data coverage, so funds without (e.g.) parsed N-PORT holdings aren't accidentally boosted by renormalization. Tracking quality is shown where computable but isn't currently part of the composite weighting. See methodology for formulas, the tracking-quality partial-coverage rationale, and the dimensions we deliberately don't score (methodology v0.5.2).
Look through IVOO, or compare the fee
Tool · Look-through
Underlying holdings, with other funds added
Add tickers and weights; N-PORT positions are summed across the basket.
Tool · Cost
Compare IVOO's fee against another fund
Compounds the 0.070% expense ratio against a peer over decades.
Tool · Overlap
Compare IVOO's holdings with peers
Pairwise holdings heatmap, pre-loaded with similar US Mid Cap funds.
Tool · TLH
Find a tax-loss harvesting partner for IVOO
Ranks every catalog fund by holdings overlap, flags wash-sale risk.
Tool · Placement
Asset location for IVOO across account types
Asset-location optimizer — places each fund in taxable / tax-deferred / Roth.
Top holdings
| # | Holding | Weight |
|---|---|---|
| 1 | Flex Ltd | 1.58% |
| 2 | Twilio Inc | 0.82% |
| 3 | TechnipFMC PLC | 0.79% |
| 4 | Curtiss-Wright Corp | 0.79% |
| 5 | nVent Electric PLC | 0.77% |
| 6 | Sterling Infrastructure Inc | 0.75% |
| 7 | XPO Inc | 0.72% |
| 8 | Everpure Inc | 0.71% |
| 9 | Illumina Inc | 0.71% |
| 10 | United Therapeutics Corp | 0.68% |
Compare IVOO with another fund
Or skim the closest-overlap funds below.
Similar ETFs by holdings overlap
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