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A truly market-value weighted commodity index

: Ludwig, M.; Mayer, H.G.; Rathgeber, A.W.; Spriegel, C.; Vogg, F.


The journal of asset management 18 (2017), No.3, pp.222–242
ISSN: 1479-179X
ISSN: 1470-8272
Journal Article
Fraunhofer FIT ()

Commodity indices play a central role in passive commodity investing. However, a closer look at commodity indices reveals huge differences in construction and weighting. For stock market indices on the other side, weighting is generally based on the market capitalization of an asset, according to the capital market theory. In contrast to this sound theoretical and practicable basis for stocks, there is a serious deficiency in commodity indexation. Therefore, in line with the classical capital market theory we present a novel approach to determine the “total investable amount” of commodities, which is the essential requirement for market capitalization based commodity indexation. In addition, we show a comprehensive model application: according to the proposed index weighting, energy allocation is significantly undervalued in existing index compositions, whereas metals and soft commodities are overvalued. Additionally, our results show that a market capitalization weighted commodity index offers very attractive risk-return characteristics for investors, compared to existing commodity indices.