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
Application Software2.82%-1.14 ppSystems Software7.08%-0.53 ppTechnology Hardware, Storage & Peripherals9.01%+0.44 ppSemiconductors3.07%-0.44 ppSemiconductor Materials & Equipment0.36%-0.16 ppCommunications Equipment0.86%-0.13 ppIT Consulting & Other Services1.27%-0.09 ppElectronic Equipment & Instruments0.38%-0.06 ppElectronic Manufacturing Services0.14%-0.02 ppInternet Services & Infrastructure0.12%-0.02 ppElectronic Components0.14%-0.01 ppTechnology Distributors0.08%-0.00 pp
3 · Sub-industry
Inside Communications Equipment
Communications Equipment · weight
0.86%
Industry change · 12M
-0.13 pp
Communications Equipment · contribution
-0.132 pp
Company participation
50%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Sep 2022 · 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 |
|---|---|---|---|---|---|---|---|
| Cisco → CSCO | United States | $164.4bn | 0.646% | -0.041 pp | -0.160 pp | -24.4% | No |
| Arista Networks → ANET | United States | $8.6bn | 0.034% | +0.006 pp | +0.028 pp | +31.4% | Yes |
| Motorola Solutions → MSI | United States | $37.4bn | 0.147% | +0.011 pp | +0.009 pp | -2.3% | Yes |
| F5, Inc. → FFIV | United States | $8.6bn | 0.034% | -0.002 pp | -0.008 pp | -27.2% | 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.