IYM vs XLB: Holdings Overlap
IYMiShares U.S. Basic Materials ETF
iShares · 38 holdings · $1.1B · as of 2026-04-30
XLBState Street® Materials Select Sector SPDR® ETF
State Street (SPDR) · 25 holdings · $8.4B · as of 2026-08-06
Holdings snapshots are 98 days apart (IYM: 2026-04-30, XLB: 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 IYM and XLB?
iShares U.S. Basic Materials ETF (IYM, by iShares) holds 38 positions; State Street® Materials Select Sector SPDR® ETF (XLB, by State Street (SPDR)) holds 25. They have 14 holdings in common, and by portfolio weight the two funds are 55.2% identical. In practical terms the pair is moderately overlapping; they share a meaningful core, but each fund adds distinct exposure.
- Overlap by Weight
- 55.2%Sum of the smaller weight of each shared holding
- Shared Holdings
- 14IYM holds 38 · XLB holds 25
- Weight in Shared Holdings
- IYM 69%·XLB 59%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 IYM
24 of 38 positions (31.0% of the fund) are not held by XLB.
Sector Breakdown
| Sector | IYM | XLB |
|---|---|---|
| Materials | 88.4% | 99.9% |
| Industrials | 11.4% | 0.0% |
| Other Sectors | 0.0% | 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.
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IYM | +5.2% | +23.1% | +34.0% | +13.6% | +9.2% | +10.8% | 1.24% |
| XLB | +2.6% | +17.5% | +22.4% | +10.0% | +6.8% | +10.2% | 1.61% |
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 IYM vs XLB →
Shared Holdings(14)
The top 10 shared positions account for 89% of the overlap, led by LIN, NEM and FCX.
 LINLinde PLC COM EUR0.001 | 19.89% | 13.29% | 13.29% |
|---|---|---|---|
 NEMNewmont Corporation COM | 10.51% | 6.60% | 6.60% |
 FCXFreeport-McMoRan Inc. CL B | 7.25% | 5.75% | 5.75% |
 ECLEcolab Inc. COM | 5.80% | 4.81% | 4.81% |
 APDAir Products & Chemicals, Inc. COM | 4.75% | 4.73% | 4.73% |
 NUENucor Corporation COM | 4.43% | 4.74% | 4.43% |
 STLDSteel Dynamics, Inc. COM | 3.38% | 4.25% | 3.38% |
 CFCF Industries Holdings, Inc. COM | 2.15% | 2.40% | 2.15% |
 LYBLyondellBasell Industries NV COM EUR0.04 CLASS 'A' | 2.13% | 2.13% | 2.13% |
 IFFInternational Flavors & Fragrances Inc. COM | 2.00% | 2.89% | 2.00% |
 ALBAlbemarle Corp COM | 2.57% | 1.98% | 1.98% |
 IPInternational Paper Co. COM | 1.77% | 2.87% | 1.77% |
 AVYAvery Dennison Corporation COM | 1.40% | 1.78% | 1.40% |
 MOSThe Mosaic Company COM | 0.82% | 1.00% | 0.82% |
Frequently Asked Questions
How much do IYM and XLB overlap?
IYM and XLB overlap by 55.2% of portfolio weight. They share 14 holdings (IYM holds 38 positions and XLB holds 25), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IYM and XLB?
The two portfolios are 55.2% 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 IYM and XLB?
The largest positions held by both funds are LIN, NEM, FCX, ECL and APD. Together the top 10 shared positions account for 89% of the total overlap.
What does IYM own that XLB doesn't?
24 positions (31.0% of IYM) are unique to IYM, led by FAST, AU and CRS. In the other direction, 11 positions (40.6% of XLB) are unique to XLB.