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 Banks3.92%-4.52 ppInvestment Banking & Brokerage0.72%-0.90 ppAsset Management & Custody Banks0.53%-0.68 ppProperty & Casualty Insurance0.64%-0.58 ppTransaction & Payment Processing Services1.04%-0.49 ppConsumer Finance0.49%-0.47 ppRegional Banks0.34%-0.44 ppLife & Health Insurance0.47%-0.37 ppFinancial Exchanges & Data0.53%-0.31 ppMulti-line Insurance0.20%-0.26 ppInsurance Brokers0.32%-0.20 ppReinsurance0.03%-0.02 ppMulti-Sector Holdings0.00%-0.00 pp
3 · Sub-industry
Inside Insurance Brokers
Insurance Brokers · weight
0.32%
Industry change · 12M
-0.20 pp
Insurance Brokers · contribution
-0.200 pp
Company participation
67%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jan 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 |
|---|---|---|---|---|---|---|---|
| Marsh McLennan → MRSH | United States | $44.4bn | 0.147% | +0.002 pp | -0.097 pp | +7.7% | Yes |
| Aon plc → AON | United States | $37.6bn | 0.124% | -0.003 pp | -0.079 pp | +11.4% | Yes |
| Arthur J. Gallagher & Co. → AJG | United States | $13.7bn | 0.045% | -0.001 pp | -0.025 pp | +11.9% | 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.