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
Semiconductors3.65%+0.43 ppSystems Software4.69%+0.42 ppTechnology Hardware, Storage & Peripherals2.08%+0.39 ppApplication Software3.12%+0.33 ppCommunications Equipment1.39%+0.07 ppIT Consulting & Other Services1.70%-0.05 ppInternet Services & Infrastructure0.15%+0.03 ppElectronic Components0.16%-0.02 ppSemiconductor Materials & Equipment0.34%-0.01 ppElectronic Equipment & Instruments0.17%+0.01 ppElectronic Manufacturing Services0.20%-0.01 ppTechnology Distributors0.00%+0.00 pp
3 · Sub-industry
Inside IT Consulting & Other Services
IT Consulting & Other Services · weight
1.70%
Industry change · 12M
-0.05 pp
IT Consulting & Other Services · contribution
-0.049 pp
Company participation
50%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
May 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 |
|---|---|---|---|---|---|---|---|
| IBM → IBM | United States | $124.0bn | 0.752% | -0.070 pp | -0.074 pp | -11.9% | No |
| Accenture → ACN | United States | $99.2bn | 0.602% | -0.013 pp | +0.018 pp | -2.2% | Yes |
| Cognizant → CTSH | United States | $44.1bn | 0.268% | -0.021 pp | +0.006 pp | -2.9% | No |
| Gartner → IT | United States | $12.1bn | 0.073% | +0.012 pp | +0.002 pp | -4.3% | 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.