# Index Categorization

CBI indices are generally categorized into **Market Capitalization Weighted** and **Non-market Capitalization Weighted Indices**.

Most CBI indices are market capitalization weighted and typically circulating-adjusted, where each constituent's weight in the index is proportional to its circulating-adjusted market value. CBI also provides capped market capitalization weighted index where single index constituents or defined groups of index constituents, such as sector or theme groups, are confined to a maximum weight.

Non-market capitalization weighted indices include those not weighted by circulating-adjusted market capitalization and generally are not affected by notional market capitalization changes resulting from corporate events, such as indices that apply equal weighting or other alternative weighting schemes.

> Market Capitalization Weighted Indices
>
> * Market capitalization indices - where constituent weights are determined by total or circulating-adjusted market capitalization.
> * Capped market capitalization indices - where single index constituents or defined groups of index constituents, such as sector or theme groups, are confined to a maximum index weight.
>
> Non-market Capitalization Weighted Indices
>
> * Equal weighted indices - where each constituent is weighted equally in the index.


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