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
Systems Software9.23%+2.44 ppSemiconductors4.26%+0.94 ppApplication Software3.89%+0.89 ppTechnology Hardware, Storage & Peripherals8.24%-0.26 ppIT Consulting & Other Services1.39%+0.18 ppSemiconductor Materials & Equipment0.59%+0.15 ppCommunications Equipment0.81%-0.11 ppElectronic Equipment & Instruments0.34%-0.04 ppElectronic Manufacturing Services0.18%+0.04 ppElectronic Components0.13%-0.02 ppInternet Services & Infrastructure0.10%-0.01 ppTechnology Distributors0.09%-0.00 pp
3 · Sub-industry
Inside Electronic Components
Electronic Components · weight
0.13%
Industry change · 12M
-0.02 pp
Electronic Components · contribution
-0.016 pp
Company participation
50%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Feb 2024 · 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 |
|---|---|---|---|---|---|---|---|
| Corning Inc. → GLW | United States | $27.5bn | 0.079% | +0.003 pp | -0.022 pp | -1.6% | No |
| Amphenol → APH | United States | $16.4bn | 0.047% | +0.005 pp | +0.006 pp | +42.3% | 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.