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 Software3.14%-0.70 ppTechnology Hardware, Storage & Peripherals9.31%+0.68 ppSystems Software7.34%-0.16 ppSemiconductor Materials & Equipment0.42%-0.14 ppCommunications Equipment0.85%-0.13 ppElectronic Equipment & Instruments0.39%-0.05 ppIT Consulting & Other Services1.27%-0.05 ppSemiconductors3.46%+0.03 ppInternet Services & Infrastructure0.12%-0.03 ppElectronic Manufacturing Services0.15%-0.02 ppElectronic Components0.15%-0.01 ppTechnology Distributors0.08%-0.00 pp
3 · Sub-industry
Inside Communications Equipment
Communications Equipment · weight
0.85%
Industry change · 12M
-0.13 pp
Communications Equipment · contribution
-0.130 pp
Company participation
25%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jul 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 | $187.9bn | 0.646% | -0.090 pp | -0.154 pp | -15.7% | No |
| Arista Networks → ANET | United States | $9.0bn | 0.031% | -0.001 pp | +0.025 pp | +22.6% | No |
| F5, Inc. → FFIV | United States | $10.1bn | 0.035% | -0.002 pp | -0.007 pp | -19.0% | No |
| Motorola Solutions → MSI | United States | $39.9bn | 0.137% | +0.007 pp | +0.007 pp | +8.0% | 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.