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 Software7.77%+2.09 ppCommunications Equipment1.20%-0.37 ppTechnology Hardware, Storage & Peripherals2.18%+0.33 ppSemiconductors3.62%+0.26 ppApplication Software3.58%+0.24 ppIT Consulting & Other Services1.49%-0.13 ppTechnology Distributors0.09%+0.09 ppElectronic Equipment & Instruments0.37%+0.07 ppElectronic Components0.11%-0.05 ppElectronic Manufacturing Services0.14%-0.04 ppSemiconductor Materials & Equipment0.29%+0.03 ppInternet Services & Infrastructure0.22%+0.02 pp
3 · Sub-industry
Inside Communications Equipment
Communications Equipment · weight
1.20%
Industry change · 12M
-0.37 pp
Communications Equipment · contribution
-0.368 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Apr 2020 · 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 | $179.7bn | 1.006% | +0.044 pp | -0.366 pp | -21.9% | Yes |
| Motorola Solutions → MSI | United States | $24.5bn | 0.137% | -0.012 pp | +0.005 pp | +0.7% | Yes |
| F5, Inc. → FFIV | United States | $8.5bn | 0.047% | +0.011 pp | -0.005 pp | -11.2% | Yes |
| Arista Networks → ANET | United States | $1.0bn | 0.006% | +0.001 pp | -0.002 pp | -29.8% | 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.