Observatory · observe first
Follow the allocation change
Matched S&P 500 members → sector → industry → sub-industry → company. Each step uses the same percentage points.
Historical time machine
Historical observation
20182026
1 · Sector
Weight and 12M allocation change
2 · Industry
Inside Information Technology
Technology Hardware, Storage & Peripherals2.02%+0.33 ppSemiconductors3.46%+0.24 ppSystems Software4.41%+0.14 ppApplication Software2.90%+0.11 ppCommunications Equipment1.43%+0.11 ppIT Consulting & Other Services1.78%+0.04 ppSemiconductor Materials & Equipment0.39%+0.04 ppInternet Services & Infrastructure0.14%+0.02 ppElectronic Equipment & Instruments0.18%+0.01 ppElectronic Manufacturing Services0.22%+0.01 ppElectronic Components0.17%-0.01 ppTechnology Distributors0.00%+0.00 pp
3 · Sub-industry
Inside Semiconductors
Semiconductors · weight
3.46%
Industry change · 12M
+0.24 pp
Semiconductors · contribution
+0.237 pp
Company participation
56%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 2018 · sorted by absolute contribution to 12-month change
| Company | Country | Market cap | Universe weight | 3M contribution | 12M contribution | 12M price return | Above 6M weight average |
|---|---|---|---|---|---|---|---|
| Intel → INTC | United States | $243.1bn | 1.492% | +0.207 pp | +0.207 pp | +8.9% | Yes |
| Micron Technology → MU | United States | $60.5bn | 0.371% | +0.083 pp | +0.083 pp | +19.3% | Yes |
| Qualcomm → QCOM | United States | $82.0bn | 0.503% | -0.073 pp | -0.073 pp | -18.1% | No |
| Advanced Micro Devices → AMD | United States | $9.7bn | 0.060% | -0.016 pp | -0.016 pp | -26.9% | No |
| Analog Devices → ADI | United States | $33.7bn | 0.207% | +0.014 pp | +0.014 pp | -0.3% | Yes |
| Skyworks Solutions → SWKS | United States | $18.3bn | 0.112% | +0.011 pp | +0.011 pp | +3.4% | Yes |
| Texas Instruments → TXN | United States | $102.2bn | 0.627% | +0.011 pp | +0.011 pp | -5.3% | No |
| Microchip Technology → MCHP | United States | $10.7bn | 0.066% | +0.002 pp | +0.002 pp | -3.6% | Yes |
| Nvidia → NVDA | United States | $3.5bn | 0.021% | +0.000 pp | +0.000 pp | -5.7% | No |
Company contributions use weights among matched S&P 500 members and add through each level without rescaling. Companies without matched shares and prices are omitted. These observations do not establish official index weights or actual fund flows.