ETF comparison
DIA vs MGC
Both US Large Cap.
State Street SPDR Dow Jones Industrial Average ETF Trust · Vanguard Mega Cap Index Fund
Holdings overlap
29 positions appear in both funds. Buying equal dollars of DIA and MGC would leave roughly 31.1% of each dollar exposed to the same underlying securities.
Side by side
Sub-score comparison
Tracking quality isn't part of the composite — see what we don't score for why.
Cost difference
MGC is 11 bps cheaper than DIA. On a $100,000 position that's about $110/yr more in fees for DIA.
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 DIA vs MGC.
Top shared holdings
29 shared in total| # | Holding | In DIA | In MGC | Overlap |
|---|---|---|---|---|
| 1 | MICROSOFT CORP | 4.36% | 6.10% | 4.36% |
| 2 | ALPHABET INC CL A | 4.10% | 3.79% | 3.79% |
| 3 | APPLE INC | 3.34% | 8.15% | 3.34% |
| 4 | AMAZON.COM INC | 2.74% | 4.22% | 2.74% |
| 5 | NVIDIA CORP | 2.24% | 8.54% | 2.24% |
| 6 | JPMORGAN CHASE + CO | 3.79% | 1.60% | 1.60% |
| 7 | JOHNSON + JOHNSON | 2.88% | 1.25% | 1.25% |
| 8 | WALMART INC | 1.24% | 1.17% | 1.17% |
| 9 | VISA INC CLASS A SHARES | 3.99% | 1.13% | 1.13% |
| 10 | PROCTER + GAMBLE CO/THE | 1.67% | 0.82% | 0.82% |
| 11 | HOME DEPOT INC | 3.98% | 0.79% | 0.79% |
| 12 | CHEVRON CORP | 1.88% | 0.75% | 0.75% |
Only in DIA
1 total- HONEYWELL INTERNATIONAL INC 2.52%
Only in MGC
146 total- Broadcom Inc 3.15%
- Alphabet Inc 2.99%
- Meta Platforms Inc 2.95%
- Tesla Inc 2.38%
- Eli Lilly & Co 1.87%
- Berkshire Hathaway Inc 1.83%
- Exxon Mobil Corp 1.34%
- Micron Technology Inc 0.97%
- Costco Wholesale Corp 0.94%
- Mastercard Inc 0.87%
Open DIA or MGC 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.