Which Past Returns Affect Trading Volume?
AbstractAnecdotal evidence and recent theoretical models argue that past stock returns affect subsequent stock trading volume. We study 3,000 individual investors over a 51 month period to test this prediction using linear panel regressions as well as negative binomial panel regressions and Logit panel regressions. We find that both past market returns as well as past portfolio returns affect trading activity of individual investors (as measured by stock portfolio turnover, the number of stock transactions, and the probability to trade stocks in a given month) and are thus able to confirm predictions of overconfidence models. However, contrary to intuition, the effect of market returns on subsequent trading volume is stronger for the whole group of investors. Using survey data of our investor sample, we present evidence that individual investors, on average, are unable to give a correct estimate of their own past realized stock portfolio performance. The correlation between return estimates and past realized returns is insignificant. For the subgroup of respondents, we are able to analyze the link between the ability to correctly estimate the past realized stock portfolio performance on the one hand and the dependence of trading volume on past returns on the other hand. We find that for the subgroup of investors that is better able to estimate the own past realized stock portfolio performance, the effect of past portfolio returns on trading volume is stronger. We argue that this finding might explain our results concerning the relation between past returns and subsequent trading volume.
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Bibliographic InfoPaper provided by Institute for Financial Research in its series SIFR Research Report Series with number 35.
Length: 51 pages
Date of creation: 15 Oct 2005
Date of revision:
Publication status: Published in Journal of Financial Markets, 2009, pages 1-31.
Contact details of provider:
Postal: Institute for Financial Research Drottninggatan 89, SE-113 60 Stockholm, Sweden
Web page: http://www.sifr.org/
More information through EDIRC
Individual investors; Investor behavior; Trading volume; Stock returns and Trading Volume; Overconfidence; Discount broker; Online broker; Online banks; Panel data; Count data;
Find related papers by JEL classification:
- D80 - Microeconomics - - Information, Knowledge, and Uncertainty - - - General
- G10 - Financial Economics - - General Financial Markets - - - General (includes Measurement and Data)
This paper has been announced in the following NEP Reports:
- NEP-ALL-2006-01-24 (All new papers)
- NEP-FIN-2006-01-24 (Finance)
- NEP-FMK-2006-01-24 (Financial Markets)
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