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
Semiconductors1.76%-1.46 ppSystems Software2.84%-1.43 ppApplication Software1.72%-1.07 ppIT Consulting & Other Services0.85%-0.90 ppTechnology Hardware, Storage & Peripherals0.97%-0.72 ppCommunications Equipment0.80%-0.51 ppSemiconductor Materials & Equipment0.12%-0.23 ppElectronic Manufacturing Services0.09%-0.11 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
0.80%
Industry change · 12M
-0.51 pp
Communications Equipment · contribution
-0.512 pp
Company participation
25%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 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 | $194.8bn | 0.696% | -0.012 pp | -0.475 pp | +6.7% | No |
| Motorola Solutions → MSI | United States | $18.8bn | 0.067% | -0.000 pp | -0.025 pp | +17.8% | No |
| F5, Inc. → FFIV | United States | $9.8bn | 0.035% | -0.004 pp | -0.016 pp | +12.1% | No |
| Arista Networks → ANET | United States | $1.0bn | 0.004% | -0.000 pp | +0.004 pp | -23.6% | 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.