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The Review of Asset Pricing Studies Vol. 7 No. 2 2017

Extended Stock Returns in Response to S&P 500 Index Changes

Nimesh Patel; Ivo Welch

UCLA Anderson Graduate School of Management

Abstract

Our paper investigates extended abnormal returns for S&P 500 index changes in a comprehensive 1979-2015 sample. The literature’s depiction of longer window returns lacked both appropriate nuance and cross-sectional analysis. Solid evidence for reversion appears in the 2000s. Stocks no longer experience permanent shifts in investor demand when they are either added to or removed from the S&P 500. Received April 19, 2016; editorial decision January 23, 2017 by Editor Jeffrey Pontiff

DOI
10.1093/rapstu/rax012
Volume
7
Issue
2
Pages
172-208
Language
en
Sources
openalex crossref bibtex:phds-export.bib

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