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ETF comparison

IWS vs SPYM

US Mid Cap vs US Large Cap.

iShares Russell Mid-Cap Value ETF · State Street SPDR Portfolio S&P 500 ETF

Holdings overlap

Weighted by ISIN/CUSIP
11.5 %

279 positions appear in both funds. Buying equal dollars of IWS and SPYM would leave roughly 11.5% of each dollar exposed to the same underlying securities.

IWS unmatched 88.3% Shared 11.5% SPYM unmatched 88.3%

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 IWS only
441 positions
Shared
279 positions
In SPYM only
227 positions

Side by side

IWS

iShares Russell Mid-Cap Value ETF

iShares · US Mid Cap

88 composite / 100
Expense ratio
0.23%
Net assets
$14.78B
TTM yield
1.31%
Top-10 conc.
7.1%
SPYM

State Street SPDR Portfolio S&P 500 ETF

State Street · US Large Cap

91 composite / 100
Expense ratio
0.020%
Net assets
$173.63B
TTM yield
1.02%
Top-10 conc.
36.4%

Sub-score comparison

77
Cost
98
88
Tax efficiency
88
100
Liquidity
100
100
Concentration
62
—
Tracking quality
—
IWS sub-score SPYM

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

Cost difference

SPYM is 21 bps cheaper than IWS. On a $100,000 position that's about $210/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 SPYM.

Top shared holdings

279 shared in total
# Holding In IWS In SPYM Overlap
1 ROBINHOOD MARKETS INC 0.13% 0.12% 0.12%
2 ROYAL CARIBBEAN CRUISES LTD 0.34% 0.12% 0.12%
3 COHERENT CORP 0.54% 0.12% 0.12%
4 MARATHON PETROLEUM CORP 0.36% 0.12% 0.12%
5 UNITED RENTALS INC 0.53% 0.11% 0.11%
6 PHILLIPS 66 0.62% 0.11% 0.11%
7 WARNER BROS. DISCOVERY INC 0.63% 0.10% 0.10%
8 KINDER MORGAN INC 0.61% 0.10% 0.10%
9 DELTA AIR LINES INC 0.56% 0.09% 0.09%
10 ALLSTATE CORP (THE) 0.60% 0.09% 0.09%
11 KEYSIGHT TECHNOLOGIES INC 0.25% 0.09% 0.09%
12 HEWLETT PACKARD ENTERPRISE COMPANY 0.59% 0.09% 0.09%

Only in IWS

441 total
  • CHENIERE ENERGY INC 0.46%
  • FERGUSON ENTERPRISES INC 0.42%
  • SUNBELT RENTALS HOLDINGS INC 0.30%
  • MKS INC 0.27%
  • ILLUMINA INC 0.26%
  • TWILIO INC 0.25%
  • MARKEL GROUP INC 0.24%
  • ENTEGRIS INC 0.23%
  • ROYALTY PHARMA PLC 0.23%
  • OKTA INC 0.22%

Only in SPYM

227 total
  • NVIDIA Corp 7.51%
  • Apple Inc 6.59%
  • Microsoft Corp 4.29%
  • Amazon.com Inc 3.62%
  • Alphabet Inc 3.25%
  • Broadcom Inc 2.77%
  • Alphabet Inc 2.59%
  • Micron Technology Inc 2.02%
  • Meta Platforms Inc 1.92%
  • Tesla Inc 1.83%

Related comparisons

More comparisons with IWS

More comparisons with SPYM

Percentages are holdings overlap with the named fund.

Open IWS or SPYM 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.