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
Semiconductors1.74%-1.48 ppSystems Software2.88%-1.39 ppApplication Software1.76%-1.03 ppIT Consulting & Other Services0.89%-0.85 ppTechnology Hardware, Storage & Peripherals1.03%-0.67 ppCommunications Equipment0.82%-0.49 ppSemiconductor Materials & Equipment0.13%-0.22 ppElectronic Manufacturing Services0.09%-0.12 ppElectronic Components0.10%-0.08 ppInternet Services & Infrastructure0.10%-0.03 ppElectronic Equipment & Instruments0.14%-0.02 ppTechnology Distributors0.00%+0.00 pp
3 · Sub-industry
Inside Communications Equipment
Communications Equipment · weight
0.82%
Industry change · 12M
-0.49 pp
Communications Equipment · contribution
-0.490 pp
Company participation
25%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Nov 2018 · 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 | $215.2bn | 0.715% | -0.010 pp | -0.456 pp | +17.9% | No |
| Motorola Solutions → MSI | United States | $21.5bn | 0.071% | +0.004 pp | -0.021 pp | +33.8% | No |
| F5, Inc. → FFIV | United States | $10.4bn | 0.035% | -0.002 pp | -0.017 pp | +19.0% | No |
| Arista Networks → ANET | United States | $1.1bn | 0.004% | -0.001 pp | +0.004 pp | -13.5% | 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.