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VOvsSIZEETF Comparison
Vanguard Mid-Cap ETF (VO) belongs to the US Mid Cap segment. iShares MSCI USA Size Factor ETF (SIZE) is part of the US Large Cap segment. VO's top 3 sector exposures are Industrials, Information Technology and Financials. In contrast, SIZE's top sector exposures are Information Technology, Industrials and Financials. VO is less expensive with a Total Expense Ratio (TER) of 0.03%, versus 0.15% for SIZE. VO is up 1.39% year-to-date (YTD) with +$1.80B in YTD flows. SIZE performs worse with 0.76% YTD performance, and -$8M in YTD flows. Run a side-by-side ETF comparison of VO and SIZE below, and assess how they stack up in performance, liquidity, risk, exposure, holdings, and more, helping you select the best ETF for your investments.
VO vs SIZE performance and flow charts
Performance
Cumulative Flows
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | VO SIZE | -2.83%-3.53% | -0.68%-0.80% | +1.39%+0.76% | +17.03%+14.97% | +52.52%+51.67% | +42.50%+46.12% |
| Flows | VO SIZE | +$1.13B-$8M | +$2.98B+$8M | +$1.80B-$8M | +$10.72B+$29M | +$19.23B-$47M | +$28.98B-$670M |
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | VO SIZE | +12.81%+12.03% | +17.64%+17.50% | +14.86%+14.74% | +17.55%+17.04% |
| Max drawdown | VO SIZE | -4.18%-3.87% | -13.44%-13.31% | -18.93%-18.57% | -27.54%-24.05% |
| Max drawdown duration | VO SIZE | 13d13d | 46d46d | 211d219d | 972d820d |
VO | SIZE | |
Last sale 3/12/2026 at 1:56 PM | $291.89 | $162.44 |
| Previous close 03/11/2026 | $294.20 | $163.29 |
| Consolidated volume 03/11/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Create an account to view replication metrics
VO | SIZE | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
VO | SIZE | |
|---|---|---|
| Last price | $291.89 | $162.44 |
| 1D performance | -0.79% | -0.52% |
| AuM | $93.78 B | $382.73 M |
| E/R | 0.03% | 0.15% |
Countries
Sectors
Diversification
Total weight of top 15 holdings out of 15
Total weight of top 15 holdings out of 15
Top 15 holdings
How have the VO and SIZE ETFs performed in 2026?
As of March 11, 2026, VO is up 1.39% year-to-date (YTD), while SIZE has returned 0.76%. That puts VO better performer ahead so far this year.
Which ETF is attracting more investor money: VO or SIZE?
Year-to-date, the VO ETF saw +$1.80B in flows, compared to -$8M for SIZE.
Which ETF is more volatile: VO or SIZE?
Over the past year, VO had a volatility of 17.64%, while SIZE experienced 17.5%.
Which ETF is bigger: VO or SIZE?
As of March 11, 2026, VO holds $93.78 B in assets under management (AUM), while SIZE manages $382.73 M.
What sectors do the VO and SIZE ETFs invest in?
VO leans toward sectors like Industrials, Information Technology and Financials. Meanwhile, SIZE focuses on Information Technology, Industrials and Financials.
What are the top holdings of the VO ETF and SIZE ETF?
VO top holdings include NEWMONT CORP, CONSTELLATION ENERGY CORP and SEAGATE TECHNOLOGY HOLDINGS PLC. SIZE holds in its top three: US7731211089, ECHOSTAR and WESTERN DIGITAL.
Which ETF is more diversified: VO or SIZE?
VO holds 287 securities with 13.18% of its assets in the top 15. SIZE has 544 securities and a top 15 weight of 4.05%.
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