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ETF comparison

IWM vs VO

US Small Cap vs US Mid Cap.

iShares Russell 2000 ETF · Vanguard Morningstar Mid-Cap ETF

Holdings overlap

Weighted by ISIN/CUSIP
0.0 %

0 positions appear in both funds. Buying equal dollars of IWM and VO would leave roughly 0.0% of each dollar exposed to the same underlying securities.

IWM unmatched 99.8% Shared 0.0% VO unmatched 99.7%

Unmatched is the part of a fund's weight the other fund doesn't match: names only it holds, plus any extra weight it puts in names both funds hold.

In IWM only
2,014 positions
Shared
0 positions
In VO only
282 positions

Side by side

IWM

iShares Russell 2000 ETF

iShares · US Small Cap

90 composite / 100
Expense ratio
0.19%
Net assets
$78.04B
TTM yield
0.99%
Top-10 conc.
3.4%
VO

Vanguard Morningstar Mid-Cap ETF

Vanguard · US Mid Cap

96 composite / 100
Expense ratio
0.030%
Net assets
$216.43B
whole fund, 5 share classes
TTM yield
1.00%
Top-10 conc.
9.5%

Sub-score comparison

81
Cost
97
89
Tax efficiency
88
100
Liquidity
100
100
Concentration
100
—
Tracking quality
—
IWM sub-score VO

Tracking quality isn't part of the composite — see what we don't score for why.

Cost difference

VO is 16 bps cheaper than IWM. On a $100,000 position that's about $160/yr more in fees for IWM.

Fee figure is the annual expense charged on $100,000. To see how the gap compounds over a multi-decade holding period, open the cost calculator pre-filled with IWM vs VO.

Top shared holdings

0 shared in total

No shared holdings between these funds.

Only in IWM

2,014 total
  • Moog, Inc. 0.38%
  • Hut 8 Corp. 0.37%
  • Viasat, Inc. 0.35%
  • BrightSpring Health Services, Inc. 0.35%
  • Cytokinetics, Inc. 0.35%
  • MaxLinear, Inc. 0.34%
  • Argan, Inc. 0.34%
  • UMB Financial Corp. 0.33%
  • JFrog Ltd. 0.31%
  • Riot Platforms, Inc. 0.30%

Only in VO

282 total
  • Vertiv Holdings Co 1.22%
  • Western Digital Corp 1.06%
  • Seagate Technology Holdings PLC 1.05%
  • Quanta Services Inc 1.04%
  • Howmet Aerospace Inc 1.04%
  • Cummins Inc 0.95%
  • Datadog Inc 0.83%
  • Bloom Energy Corp 0.79%
  • Constellation Energy Corp 0.78%
  • Robinhood Markets Inc 0.77%

Related comparisons

More comparisons with IWM

More comparisons with VO

Percentages are holdings overlap with the named fund.

Open IWM or VO at a brokerage

Both funds trade commission-free at major US brokerages.

Open at Fidelity

Affiliate links — opening an account through these earns PlainIndex a one-time referral. Scoring is computed before any affiliate consideration; see our methodology and funding disclosure.

Holdings overlap is the sum of min(weight_a, weight_b) over positions matched on ISIN (CUSIP fallback). Methodology: see /methodology/.

Comparing two funds doesn't endorse swapping one for the other. Tax-lot history, account type, and personal goals matter — PlainIndex publishes data and methodology, not investment advice.