ETF comparison

MGC vs OEF

Both US Large Cap.

Vanguard Mega Cap Index Fund · iShares S&P 100 ETF

Holdings overlap

Weighted by ISIN/CUSIP
87.0 %

100 positions appear in both funds. Buying equal dollars of MGC and OEF would leave roughly 87.0% of each dollar exposed to the same underlying securities.

MGC only 12.7% Shared 87.0% OEF only 12.8%
In MGC only
75 positions
Shared
100 positions
In OEF only
1 positions

Side by side

MGC

Vanguard Mega Cap Index Fund

Vanguard · US Large Cap

88 composite / 100
Expense ratio
0.050%
Net assets
$10.57B
TTM yield
0.91%
Top-10 conc.
44.1%
OEF

iShares S&P 100 ETF

iShares · US Large Cap

81 composite / 100
Expense ratio
0.20%
Net assets
$20.04B
TTM yield
0.86%
Top-10 conc.
50.5%

Sub-score comparison

95
Cost
80
89
Tax efficiency
89
100
Liquidity
100
51
Concentration
42
Tracking quality
MGC sub-score OEF

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

Cost difference

MGC is 15 bps cheaper than OEF. On a $100,000 position that's about $150/yr more in fees for OEF.

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 MGC vs OEF.

Top shared holdings

100 shared in total
# Holding In MGC In OEF Overlap
1 NVIDIA Corp 8.54% 10.50% 8.54%
2 Apple Inc 8.15% 9.23% 8.15%
3 Microsoft Corp 6.10% 6.81% 6.10%
4 Amazon.com Inc 4.22% 5.04% 4.22%
5 Alphabet Inc 3.79% 4.15% 3.79%
6 Broadcom Inc 3.15% 3.64% 3.15%
7 Alphabet Inc 2.99% 3.32% 2.99%
8 Meta Platforms Inc 2.95% 3.10% 2.95%
9 Tesla Inc 2.38% 2.59% 2.38%
10 Berkshire Hathaway Inc 1.83% 2.18% 1.83%
11 Eli Lilly & Co 1.87% 1.81% 1.81%
12 JPMorgan Chase & Co 1.60% 1.96% 1.60%

Only in MGC

75 total
  • KLA Corp 0.42%
  • TJX Cos Inc/The 0.38%
  • Amphenol Corp 0.37%
  • Analog Devices Inc 0.36%
  • Eaton Corp PLC 0.31%
  • Welltower Inc 0.30%
  • S&P Global Inc 0.29%
  • Arista Networks Inc 0.28%
  • Stryker Corp 0.28%
  • Prologis Inc 0.28%

Only in OEF

1 total
  • General Motors Company 0.17%

Open MGC or OEF at a brokerage

Both funds trade commission-free at major US brokerages.

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.