Do Tobin taxes help stop stock price bubbles?

Purpose This study aims to report on experimental asset markets designed to examine the impact of a levy on trade, as well as the taxation authority’s ability to raise tax revenue when markets are subject to mispricing. Some have suggested that a transaction tax will discourage irrational speculation and lead to more efficient markets, but others argue that a higher cost of trading will prove to be an impediment to trade with no useful outcomes. Design/methodology/approach The authors’ goal is to provide insight on the impact of a transaction tax in a very specific asset market. The authors chose this design because the robustness of the bubble and crash pattern points to an environment that is particularly appropriate for the study of the effectiveness of a transaction tax in promoting efficient pricing. Furthermore, in a laboratory, the authors can control for extraneous factors that are problematic in the study of naturally occurring environments. Findings The authors examine whether a securities transaction tax promotes efficiency in markets that are prone to mispricing and find little evidence that a tax on trade will reduce speculation. Research limitations/implications This study’s experimental environment is, of course, an abstraction of naturally occurring markets and it may be that the model excludes important aspects. Social implications The authors find that a tax on financial transactions allows the taxation authority to raise significant revenue with little impact on pricing or trading volume. Originality/value To the best of the authors’ knowledge, this study is the first systematic examination of a transaction tax on outcomes in a market that is prone to mispricing.

The effect of induced mood on traders’ preferences in asset markets – experimental evidence

PurposeIn this paper, we study the effect of induced positive and negative moods on traders' willingness to trade (pay and accept) in experimental asset markets.Design/methodology/approachWe conduct experimental asset markets where subjects undergo a mood induction procedure prior to trade. After the subjects are induced with either negative or positive affect, they can trade an experimental asset with a known stream of dividends for a known number of periods.FindingsWe first show that both positive and negative affects are associated with larger positive deviations from fundamental values. We also show that when subjects are induced with positive mood, they bid higher prices but for fewer units of the stock. On the supply side, positive affect is associated with higher prices and quantities, and consequently in higher willingness to offer. Finally, we use our experimental data to test existing theories on mood effect. We find that negative affect is related to momentum trading, while positive affect is associated with information processing.Originality/valueTo our knowledge, this is the first work that studies the effect of mood on traders' behavior, rather than market outcomes.