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 Software6.70%-1.85 ppApplication Software2.87%-1.33 ppTechnology Hardware, Storage & Peripherals8.28%-1.27 ppSemiconductors3.14%-0.89 ppSemiconductor Materials & Equipment0.41%-0.18 ppElectronic Equipment & Instruments0.38%-0.08 ppCommunications Equipment0.92%-0.07 ppIT Consulting & Other Services1.31%-0.04 ppElectronic Manufacturing Services0.14%-0.03 ppInternet Services & Infrastructure0.12%-0.03 ppElectronic Components0.14%-0.01 ppTechnology Distributors0.09%-0.00 pp
3 · Sub-industry
Inside Communications Equipment
Communications Equipment · weight
0.92%
Industry change · 12M
-0.07 pp
Communications Equipment · contribution
-0.066 pp
Company participation
75%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Nov 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 | $204.3bn | 0.693% | +0.030 pp | -0.088 pp | -6.5% | Yes |
| Arista Networks → ANET | United States | $10.6bn | 0.036% | +0.003 pp | +0.028 pp | +12.3% | Yes |
| F5, Inc. → FFIV | United States | $9.3bn | 0.032% | -0.002 pp | -0.015 pp | -32.1% | No |
| Motorola Solutions → MSI | United States | $45.5bn | 0.154% | +0.009 pp | +0.010 pp | +9.0% | 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.