VXF vs MDY: Holdings Overlap
VXFVanguard Extended Market Index Fund
Vanguard · 3359 holdings · $32.2B · as of 2026-03-31
MDYState Street® SPDR® S&P MIDCAP 400® ETF Trust
State Street (SPDR) · 399 holdings · $27.1B · as of 2026-08-06
Holdings snapshots are 128 days apart (VXF: 2026-03-31, MDY: 2026-08-06). Weights and index membership change between snapshots, so the true current overlap is typically higher than shown. For funds tracking the same index, the gap can be 5–15 points.
How similar are VXF and MDY?
Vanguard Extended Market Index Fund (VXF, by Vanguard) holds 3359 positions; State Street® SPDR® S&P MIDCAP 400® ETF Trust (MDY, by State Street (SPDR)) holds 399. They have 399 holdings in common, and by portfolio weight the two funds are 43.8% identical. In practical terms the pair is moderately overlapping; they share a meaningful core, but each fund adds distinct exposure.
- Overlap by Weight
- 43.8%Sum of the smaller weight of each shared holding
- Shared Holdings
- 399VXF holds 3359 · MDY holds 399
- Weight in Shared Holdings
- VXF 44%·MDY 105%Share of each fund's weight in stocks both funds own
Based on each fund's latest official holdings. How is this calculated?
What makes each fund different
Only in VXF
2960 of 3359 positions (56.0% of the fund) are not held by MDY. Showing the top 30 by weight.
Only in MDY
Every position in MDY is also held by VXF, so it brings nothing the other fund doesn’t already own.
Sector Breakdown
| Sector | VXF | MDY |
|---|---|---|
| Industrials | 19.5% | 25.9% |
| Information Technology | 16.3% | 15.6% |
| Financials | 15.0% | 16.0% |
| Health Care | 13.3% | 10.3% |
| Consumer Discretionary | 9.8% | 11.6% |
| Other Sectors | 23.6% | 25.7% |
| Unclassified | 2.4% | 0.0% |
Share of each fund's portfolio weight by GICS-style sector, compiled from issuer fund data and our own classification of the holdings, not the issuers' published sector charts. “Unclassified” is weight we could not classify (2% of VXF, 0% of MDY).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| VXF | +2.4% | +18.9% | +26.9% | +18.6% | +6.9% | +12.0% | 0.99% |
| MDY | +3.1% | +18.1% | +25.6% | +14.2% | +8.8% | +10.9% | 0.99% |
Total returns including dividends, from adjusted daily closes as of 2026-08-07. 3Y/5Y/10Y are annualized. Yield is trailing-12-month distributions over the last close. Past performance does not predict future results.
Project the growth of $10,000 in VXF vs MDY →
Shared Holdings(399)
The top 10 shared positions account for 7% of the overlap, led by FTI, UTHR and CW.
 FTITechnipFMC PLC USD1 | 0.38% | 0.76% | 0.38% |
|---|---|---|---|
 UTHRUnited Therapeutics Corporation COM | 0.35% | 0.62% | 0.35% |
 CWCurtiss-Wright Corporation | 0.34% | 0.72% | 0.34% |
 XPOXPO Inc COM | 0.31% | 0.63% | 0.31% |
 WWDWoodward Inc. COM | 0.29% | 0.60% | 0.29% |
 RGLDRoyal Gold, Inc. COM | 0.28% | 0.49% | 0.28% |
 USFDUS Foods Holding Corp COM | 0.28% | 0.64% | 0.28% |
 BURLBurlington Stores Inc. COM | 0.28% | 0.64% | 0.28% |
 ATIATI Inc COM | 0.27% | 0.83% | 0.27% |
 MTZMastec, Inc. COM | 0.27% | 0.44% | 0.27% |
 CRSCarpenter Technology Corporation COM | 0.27% | 0.76% | 0.27% |
 CDECoeur Mining Inc COM NEW | 0.27% | 0.44% | 0.27% |
 TWLOTwilio, Inc., Class A | 0.26% | 0.80% | 0.26% |
 NVTNVent Electric PLC COM USD0.01 | 0.26% | 0.72% | 0.26% |
 ILMNIllumina Inc COM | 0.26% | 0.80% | 0.26% |
 BWXTBWX Technologies Inc. COM | 0.26% | 0.42% | 0.26% |
 FNFabrinet COM USD0.01 | 0.26% | 0.53% | 0.26% |
 PEverpure, Inc., Class A | 0.25% | 0.75% | 0.25% |
 NXTNextpower Inc. CLASS A COM | 0.25% | 0.40% | 0.25% |
 ENTGEntegris Inc COM | 0.24% | 0.59% | 0.24% |
 RBARB Global Inc COM | 0.24% | 0.47% | 0.24% |
 AAAlcoa Corporation COM | 0.24% | 0.68% | 0.24% |
 RBCRBC Bearings Incorporated | 0.24% | 0.49% | 0.24% |
 THCTenet Healthcare Corporation COM NEW | 0.23% | 0.60% | 0.23% |
 OVVOvintiv Inc COM | 0.23% | 0.45% | 0.23% |
Showing the top 250 of 399 shared holdings by overlap weight.
Frequently Asked Questions
How much do VXF and MDY overlap?
VXF and MDY overlap by 43.8% of portfolio weight. They share 399 holdings (VXF holds 3359 positions and MDY holds 399), based on each fund's latest SEC-reported holdings.
Is it redundant to own both VXF and MDY?
The two portfolios are 43.8% identical by weight. Owning both is defensible: they share a meaningful core, but each fund adds exposure the other lacks.
What are the biggest shared holdings of VXF and MDY?
The largest positions held by both funds are FTI, UTHR, CW, XPO and WWD. Together the top 10 shared positions account for 7% of the total overlap.
What does VXF own that MDY doesn't?
2960 positions (56.0% of VXF) are unique to VXF, led by MRVL, NET and LNG. In the other direction, 0 positions (0.0% of MDY) are unique to MDY.