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ETF comparison

IVOO vs SPYM

US Mid Cap vs US Large Cap.

Vanguard S&P Mid-Cap 400 Index Fund ETF Shares · State Street SPDR Portfolio S&P 500 ETF

Holdings overlap

Weighted by ISIN/CUSIP
0.0 %

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

IVOO unmatched 99.8% Shared 0.0% SPYM 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 IVOO only
400 positions
Shared
0 positions
In SPYM only
506 positions

Side by side

IVOO

Vanguard S&P Mid-Cap 400 Index Fund ETF Shares

Vanguard · US Mid Cap

92 composite / 100
Expense ratio
0.070%
Net assets
$5.81B
whole fund, 2 share classes
TTM yield
1.19%
Top-10 conc.
7.8%
SPYM

State Street SPDR Portfolio S&P 500 ETF

State Street · US Large Cap

91 composite / 100
Expense ratio
0.020%
Net assets
$181.85B
TTM yield
1.03%
Top-10 conc.
36.4%

Sub-score comparison

93
Cost
98
88
Tax efficiency
88
90
Liquidity
100
100
Concentration
62
—
Tracking quality
—
IVOO sub-score SPYM

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

Cost difference

SPYM is 5 bps cheaper than IVOO. On a $100,000 position that's about $50/yr more in fees for IVOO.

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 IVOO vs SPYM.

Top shared holdings

0 shared in total

No shared holdings between these funds.

Only in IVOO

400 total
  • Twilio Inc 1.00%
  • Illumina Inc 0.91%
  • TechnipFMC PLC 0.87%
  • Everpure Inc 0.82%
  • Okta Inc 0.81%
  • ATI Inc 0.78%
  • nVent Electric PLC 0.68%
  • Carpenter Technology Corp 0.66%
  • US Foods Holding Corp 0.65%
  • Tenet Healthcare Corp 0.64%

Only in SPYM

506 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 IVOO

More comparisons with SPYM

Percentages are holdings overlap with the named fund.

Open IVOO 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.