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 Financials
Diversified Banks8.03%-0.41 ppFinancial Exchanges & Data0.90%+0.06 ppInvestment Banking & Brokerage1.66%+0.04 ppAsset Management & Custody Banks1.18%-0.04 ppInsurance Brokers0.55%+0.03 ppMulti-line Insurance0.43%-0.02 ppConsumer Finance0.93%-0.02 ppTransaction & Payment Processing Services1.54%+0.02 ppLife & Health Insurance0.83%-0.01 ppProperty & Casualty Insurance1.23%+0.01 ppReinsurance0.06%+0.01 ppRegional Banks0.79%+0.00 ppMulti-Sector Holdings0.00%+0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.55%
Industry change · 12M
+0.03 pp
Insurance Brokers · contribution
+0.029 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 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 |
|---|---|---|---|---|---|---|---|
| Marsh McLennan → MRSH | United States | $41.9bn | 0.257% | +0.014 pp | +0.014 pp | -1.1% | Yes |
| Aon plc → AON | United States | $34.5bn | 0.212% | +0.009 pp | +0.009 pp | -1.3% | Yes |
| Arthur J. Gallagher & Co. → AJG | United States | $12.5bn | 0.077% | +0.006 pp | +0.006 pp | +1.2% | 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.