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ETF comparison

IJJ vs SPY

US Mid Cap vs US Large Cap.

iShares S&P Mid-Cap 400 Value ETF · State Street SPDR S&P 500 ETF Trust

Holdings overlap

Weighted by ISIN/CUSIP
0.1 %

1 positions appear in both funds. Buying equal dollars of IJJ and SPY would leave roughly 0.1% of each dollar exposed to the same underlying securities.

IJJ unmatched 99.4% Shared 0.1% SPY unmatched 99.9%

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 IJJ only
298 positions
Shared
1 positions
In SPY only
504 positions

Side by side

IJJ

iShares S&P Mid-Cap 400 Value ETF

iShares · US Mid Cap

89 composite / 100
Expense ratio
0.18%
Net assets
$8.33B
TTM yield
1.64%
Top-10 conc.
10.1%
SPY

State Street SPDR S&P 500 ETF Trust

State Street · US Large Cap

88 composite / 100
Expense ratio
0.094%
Net assets
$809.22B
TTM yield
1.00%
Top-10 conc.
37.9%

Sub-score comparison

82
Cost
91
87
Tax efficiency
89
97
Liquidity
100
100
Concentration
60
—
Tracking quality
—
IJJ sub-score SPY

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

Cost difference

SPY is 9 bps cheaper than IJJ. On a $100,000 position that's about $86/yr more in fees for IJJ.

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 IJJ vs SPY.

Top shared holdings

1 shared in total
# Holding In IJJ In SPY Overlap
1 Illumina, Inc. 0.70% 0.06% 0.06%

Only in IJJ

298 total
  • US Foods Holding Corp. 1.29%
  • TD SYNNEX Corp. 1.15%
  • Reliance, Inc. 1.10%
  • Performance Food Group Co. 1.01%
  • WESCO International, Inc. 0.97%
  • Entegris, Inc. 0.95%
  • Annaly Capital Management, Inc. 0.94%
  • Regal Rexnord Corp. 0.91%
  • Toll Brothers, Inc. 0.90%
  • Pinnacle Financial Partners, Inc. 0.87%

Only in SPY

504 total
  • NVIDIA CORP 8.50%
  • APPLE INC 7.32%
  • MICROSOFT CORP 5.77%
  • AMAZON.COM INC 3.71%
  • ALPHABET INC CL A 3.03%
  • BROADCOM INC 2.54%
  • ALPHABET INC CL C 2.43%
  • META PLATFORMS INC CLASS A 2.41%
  • MICRON TECHNOLOGY INC 1.82%
  • TESLA INC 1.57%

Related comparisons

More comparisons with IJJ

More comparisons with SPY

Percentages are holdings overlap with the named fund.

Open IJJ or SPY 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.