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 Software6.05%+3.21 ppSemiconductors3.36%+1.60 ppApplication Software3.06%+1.33 ppTechnology Hardware, Storage & Peripherals2.06%+1.09 ppIT Consulting & Other Services1.45%+0.60 ppCommunications Equipment1.18%+0.38 ppElectronic Equipment & Instruments0.34%+0.20 ppSemiconductor Materials & Equipment0.31%+0.18 ppTechnology Distributors0.10%+0.10 ppInternet Services & Infrastructure0.18%+0.08 ppElectronic Manufacturing Services0.16%+0.06 ppElectronic Components0.13%+0.03 pp
3 · Sub-industry
Inside Communications Equipment
Communications Equipment · weight
1.18%
Industry change · 12M
+0.38 pp
Communications Equipment · contribution
+0.378 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 2019 · 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 | $203.5bn | 0.998% | -0.116 pp | +0.302 pp | +13.8% | No |
| Motorola Solutions → MSI | United States | $27.6bn | 0.135% | -0.014 pp | +0.068 pp | +42.2% | No |
| F5, Inc. → FFIV | United States | $8.5bn | 0.042% | -0.003 pp | +0.007 pp | -13.8% | No |
| Arista Networks → ANET | United States | $1.0bn | 0.005% | -0.001 pp | +0.001 pp | -3.5% | No |
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.