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
Technology Hardware, Storage & Peripherals8.50%-1.23 ppSystems Software6.80%-1.15 ppSemiconductors3.32%-0.48 ppApplication Software3.00%-0.30 ppIT Consulting & Other Services1.21%-0.11 ppCommunications Equipment0.92%-0.09 ppSemiconductor Materials & Equipment0.44%-0.08 ppInternet Services & Infrastructure0.11%-0.03 ppElectronic Equipment & Instruments0.39%-0.02 ppElectronic Manufacturing Services0.14%-0.02 ppElectronic Components0.14%-0.02 ppTechnology Distributors0.10%+0.02 pp
3 · Sub-industry
Inside Communications Equipment
Communications Equipment · weight
0.92%
Industry change · 12M
-0.09 pp
Communications Equipment · contribution
-0.088 pp
Company participation
75%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Feb 2023 · 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 | $198.3bn | 0.697% | +0.004 pp | -0.106 pp | -10.3% | Yes |
| Motorola Solutions → MSI | United States | $44.0bn | 0.155% | +0.000 pp | +0.026 pp | +20.9% | Yes |
| F5, Inc. → FFIV | United States | $8.6bn | 0.030% | -0.001 pp | -0.012 pp | -28.8% | No |
| Arista Networks → ANET | United States | $10.6bn | 0.037% | +0.001 pp | +0.005 pp | +13.0% | 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.