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The repurchase behavior of individual investors: an experimental investigation

Martin Weber and Frank Welfens

No 07-44, Papers from Sonderforschungsbreich 504

Abstract: We analyze two recently documented follow-on purchase and repurchase patterns experimentally: Individual investors’ preference for purchasing additional shares of a stock that decreased rather than increased in value succeeding an initial purchase (pattern 1) and investors’ tendency for purchasing stocks that they previously sold at a higher price (pattern 2). Similar to the field data study by Odean, Strahilevitz, and Barber (2004), subjects in our experiment are about 2.5 to 3 times as likely to purchase units of a single fictitious good if the price of the good declined following a purchase or sale in the previous period. As an assignment of choices clearly reduces the effect, we ar-gue that investors are involved in counterfactual thinking: They refrain from purchasing additional shares or repurchasing shares at a higher price because doing so means admitting to their ex post wrong decision.

JEL-codes: C91 D14 D81 G11 (search for similar items in EconPapers)
Date: 2007
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