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ETF comparison

IWS vs VO

Both US Mid Cap.

iShares Russell Mid-Cap Value ETF · Vanguard Mid-Cap Index Fund ETF Shares

Holdings overlap

Weighted by ISIN/CUSIP
55.2 %

201 positions appear in both funds. Buying equal dollars of IWS and VO would leave roughly 55.2% of each dollar exposed to the same underlying securities.

IWS only 44.5% Shared 55.2% VO only 44.4%
In IWS only
511 positions
Shared
201 positions
In VO only
88 positions

Side by side

IWS

iShares Russell Mid-Cap Value ETF

iShares · US Mid Cap

88 composite / 100
Expense ratio
0.23%
Net assets
$15.65B
TTM yield
1.31%
Top-10 conc.
9.7%
VO

Vanguard Mid-Cap Index Fund ETF Shares

Vanguard · US Mid Cap

96 composite / 100
Expense ratio
0.030%
Net assets
$223.97B
TTM yield
1.33%
Top-10 conc.
9.0%

Sub-score comparison

77
Cost
97
88
Tax efficiency
88
100
Liquidity
100
100
Concentration
100
—
Tracking quality
—
IWS sub-score VO

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

Cost difference

VO is 20 bps cheaper than IWS. On a $100,000 position that's about $200/yr more in fees for IWS.

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 IWS vs VO.

Top shared holdings

201 shared in total
# Holding In IWS In VO Overlap
1 Western Digital Corp. 0.94% 1.00% 0.94%
2 Valero Energy Corp. 0.76% 0.80% 0.76%
3 Cummins Inc. 0.75% 0.81% 0.75%
4 Marathon Petroleum Corp. 0.75% 0.78% 0.75%
5 Phillips 66 0.69% 0.80% 0.69%
6 L3 Harris Technologies Inc 0.66% 0.70% 0.66%
7 Warner Bros. Discovery Inc. 0.65% 0.70% 0.65%
8 Digital Realty Trust Inc. 0.63% 0.67% 0.63%
9 Baker Hughes Company 0.62% 0.66% 0.62%
10 Corteva Inc 0.58% 0.62% 0.58%
11 Oneok Inc. 0.57% 0.62% 0.57%
12 Corning Incorporated 1.08% 0.57% 0.57%

Only in IWS

511 total
  • SANDISK CORP 0.92%
  • The Bank of New York Mellon Corp. 0.77%
  • Anglogold Ashanti PLC 0.44%
  • Atmos Energy Corp. 0.30%
  • TechnipFMC PLC 0.28%
  • United Therapeutics Corporation 0.26%
  • Curtiss-Wright Corp. 0.26%
  • Expand Energy Corp. 0.25%
  • FLEX LTD 0.24%
  • Omnicom Group Inc 0.24%

Only in VO

88 total
  • Vertiv Holdings Co 1.03%
  • Howmet Aerospace Inc 1.01%
  • Constellation Energy Corp 0.94%
  • Seagate Technology Holdings PLC 0.93%
  • SLB Ltd 0.84%
  • Motorola Solutions Inc 0.78%
  • CRH PLC 0.77%
  • General Motors Co 0.73%
  • Royal Caribbean Cruises Ltd 0.73%
  • TransDigm Group Inc 0.71%

Open IWS 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.