IYZ vs FDN: Holdings Overlap
IYZiShares U.S. Telecommunications ETF
iShares · 21 holdings · $1.3B · as of 2026-03-31
FDNFirst Trust Dow Jones Internet Index Fund
First Trust · 41 holdings · $5.3B · as of 2026-03-31
How similar are IYZ and FDN?
iShares U.S. Telecommunications ETF (IYZ, by iShares) holds 21 positions; First Trust Dow Jones Internet Index Fund (FDN, by First Trust) holds 41. They have 3 holdings in common, and by portfolio weight the two funds are 13.7% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 13.7%Sum of the smaller weight of each shared holding
- Shared Holdings
- 3IYZ holds 21 · FDN holds 41
- Weight in Shared Holdings
- IYZ 27%·FDN 14%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
18 of 21 positions (72.5% of the fund) are not held by FDN.
Sector Breakdown
| Sector | IYZ | FDN |
|---|---|---|
| Communication Services | 61.4% | 29.8% |
| Information Technology | 38.4% | 38.1% |
| Consumer Discretionary | 0.0% | 26.9% |
| Financials | 0.0% | 2.2% |
| Industrials | 0.0% | 1.6% |
| Other Sectors | 0.0% | 1.4% |
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% |
| FDN | +6.5% | +7.5% | +6.5% | +19.6% | +3.6% | +13.9% | — |
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 FDN →
Shared Holdings(3)
The top 3 shared positions account for 100% of the overlap, led by CSCO, ANET and CIEN.
Frequently Asked Questions
How much do IYZ and FDN overlap?
IYZ and FDN overlap by 13.7% of portfolio weight. They share 3 holdings (IYZ holds 21 positions and FDN holds 41), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IYZ and FDN?
The two portfolios are 13.7% identical by weight. Owning both is not redundant. Most of each portfolio is distinct, so the funds can serve different roles.
What are the biggest shared holdings of IYZ and FDN?
The largest positions held by both funds are CSCO, ANET and CIEN. Together the top 3 shared positions account for 100% of the total overlap.
What does IYZ own that FDN doesn't?
18 positions (72.5% of IYZ) are unique to IYZ, led by VZ, T and TMUS. In the other direction, 38 positions (86.1% of FDN) are unique to FDN.