Asset pricing with index investing

Georgy Chabakauri and Oleg Rytchkov

LSE Research Online Documents on Economics from London School of Economics and Political Science, LSE Library

Abstract: We theoretically analyze how index investing affects financial markets using a dynamic exchange economy with heterogeneous investors and two Lucas trees. We identify two ef- fects of indexing: lockstep trading of stocks increases market volatility and stock return correlations but reduction in risk sharing decreases them. Overall, indexing decreases market volatility but has an ambiguous effect on the correlations. Also, index invest- ing decreases an investor’s welfare, but indexing by other investors partially offsets the loss. When the introduction of index trading opens financial markets for new investors, the improved risk sharing makes market returns more volatile and stock returns more correlated.

Keywords: indexing; risk sharing; Lucas trees; general equilibrium; heterogeneous investors; Paul Woolley Centre (search for similar items in EconPapers)
JEL-codes: D52 D53 G12 (search for similar items in EconPapers)
Pages: 22 pages
Date: 2021-07-01
New Economics Papers: this item is included in nep-fdg and nep-rmg
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Published in Journal of Financial Economics, 1, July, 2021, 141(1), pp. 195 - 216. ISSN: 0304-405X

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Persistent link: https://EconPapers.repec.org/RePEc:ehl:lserod:105749

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