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
Semiconductors3.41%+0.19 ppTechnology Hardware, Storage & Peripherals1.86%+0.17 ppSystems Software4.42%+0.16 ppApplication Software2.93%+0.14 ppCommunications Equipment1.45%+0.14 ppIT Consulting & Other Services1.79%+0.04 ppSemiconductor Materials & Equipment0.39%+0.04 ppElectronic Manufacturing Services0.22%+0.01 ppInternet Services & Infrastructure0.14%+0.01 ppElectronic Equipment & Instruments0.17%+0.01 ppElectronic Components0.17%-0.00 ppTechnology Distributors0.00%+0.00 pp
3 · Sub-industry
Inside Semiconductors
Semiconductors · weight
3.41%
Industry change · 12M
+0.19 pp
Semiconductors · contribution
+0.185 pp
Company participation
78%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Feb 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 | $230.1bn | 1.379% | +0.094 pp | +0.094 pp | +3.1% | Yes |
| Micron Technology → MU | United States | $56.4bn | 0.338% | +0.050 pp | +0.050 pp | +11.6% | Yes |
| Texas Instruments → TXN | United States | $106.6bn | 0.639% | +0.022 pp | +0.022 pp | -1.2% | Yes |
| Skyworks Solutions → SWKS | United States | $19.9bn | 0.119% | +0.018 pp | +0.018 pp | +12.7% | Yes |
| Analog Devices → ADI | United States | $33.3bn | 0.200% | +0.007 pp | +0.007 pp | -1.9% | Yes |
| Advanced Micro Devices → AMD | United States | $11.7bn | 0.070% | -0.005 pp | -0.005 pp | -11.9% | No |
| Microchip Technology → MCHP | United States | $10.4bn | 0.062% | -0.001 pp | -0.001 pp | -6.2% | No |
| Nvidia → NVDA | United States | $3.7bn | 0.022% | +0.001 pp | +0.001 pp | -1.5% | Yes |
| Qualcomm → QCOM | United States | $96.2bn | 0.577% | +0.000 pp | +0.000 pp | -3.9% | Yes |
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.