IYZ vs VTI: Holdings Overlap
IYZiShares U.S. Telecommunications ETF
iShares · 21 holdings · $1.3B · as of 2026-03-31
VTIVanguard Total Stock Market Index Fund
Vanguard · 3505 holdings · $696.4B · as of 2026-03-31
How similar are IYZ and VTI?
iShares U.S. Telecommunications ETF (IYZ, by iShares) holds 21 positions; Vanguard Total Stock Market Index Fund (VTI, by Vanguard) holds 3505. They have 17 holdings in common, and by portfolio weight the two funds are 2.0% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 2.0%Sum of the smaller weight of each shared holding
- Shared Holdings
- 17IYZ holds 21 · VTI holds 3505
- Weight in Shared Holdings
- IYZ 89%·VTI 2%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 IYZ
4 of 21 positions (10.3% of the fund) are not held by VTI.
Sector Breakdown
| Sector | IYZ | VTI |
|---|---|---|
| Communication Services | 61.4% | 9.6% |
| Information Technology | 38.4% | 30.5% |
| Financials | 0.0% | 12.7% |
| Industrials | 0.0% | 10.4% |
| Health Care | 0.0% | 10.0% |
| Other Sectors | 0.0% | 26.1% |
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.
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IYZ | +7.6% | +29.6% | +46.8% | +27.9% | +7.6% | +5.2% | 1.61% |
| VTI | +3.3% | +14.6% | +24.2% | +20.9% | +12.3% | +14.9% | 1.02% |
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 IYZ vs VTI →
Shared Holdings(17)
The top 10 shared positions account for 97% of the overlap, led by CSCO, T and VZ.
 CSCOCisco Systems, Inc. COM | 19.13% | 0.44% | 0.44% |
|---|---|---|---|
 TAT&T Inc COM | 12.84% | 0.32% | 0.32% |
 VZVerizon Communications Inc. COM | 13.44% | 0.30% | 0.30% |
 ANETArista Networks Inc COM SHS | 3.98% | 0.21% | 0.21% |
 CMCSAComcast Corporation CL A | 3.97% | 0.16% | 0.16% |
 TMUST-Mobile US Inc COM | 4.10% | 0.15% | 0.15% |
 MSIMotorola Solutions Inc COM NEW | 3.71% | 0.11% | 0.11% |
 CIENCiena Corporation COM NEW | 4.25% | 0.09% | 0.09% |
 LITELumentum Holdings Inc. COM | 3.88% | 0.08% | 0.08% |
 ASTSAST SpaceMobile, Inc., Class A | 3.27% | 0.03% | 0.03% |
 CHTRCharter Communications, Inc., Class A | 3.35% | 0.03% | 0.03% |
 ROKURoku, Inc., Class A | 3.23% | 0.02% | 0.02% |
 LBRDKLiberty Broadband Corporation COM SER C | 2.85% | 0.01% | 0.01% |
 IRDMIridium Communications, Inc. COM | 3.74% | 0.00% | 0.00% |
 GLIBKGCI Liberty, Inc., Class C | 3.03% | 0.00% | 0.00% |
 LBRDALiberty Broadband Corporation COM SER A | 0.41% | 0.00% | 0.00% |
 GLIBAGCI Liberty, Inc., Class A | 0.31% | 0.00% | 0.00% |
Frequently Asked Questions
How much do IYZ and VTI overlap?
IYZ and VTI overlap by 2.0% of portfolio weight. They share 17 holdings (IYZ holds 21 positions and VTI holds 3505), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IYZ and VTI?
The two portfolios are 2.0% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What are the biggest shared holdings of IYZ and VTI?
The largest positions held by both funds are CSCO, T, VZ, ANET and CMCSA. Together the top 10 shared positions account for 97% of the total overlap.
What does IYZ own that VTI doesn't?
4 positions (10.3% of IYZ) are unique to IYZ, led by TIGO, UI and LBTYA. In the other direction, 3488 positions (97.7% of VTI) are unique to VTI.