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9. Dezember 2015

Seminar

Can a Financial Transaction Tax Prevent Stock Price Booms?

Termin

9. Dezember 2015
12:00 - 13:15

Ort

Gustav-Schmoller-Raum
DIW Berlin im Quartier 110
Room 3.3.002A
Mohrenstraße 58
10117 Berlin

Sprecher*innen

Klaus Adam, University of Mannheim

We present a stock market model that quantitatively replicates the joint behavior of stock prices, trading volume and investor expectations. Stock prices in the model occasionally display belief-driven boom and bust cycles that delink asset prices from fundamentals and redistribute considerable amounts of wealth from less to more experienced investors. Although gains from trade arise only from subjective belief differences, introducing financial transactions taxes (FTTs) remains undesirable. While FTTs reduce the size and length of boom-bust cycles, they increase the likelihood of such cycles, therby overall return volatility and wealth redistribution. Contingent FTTs, which are levied only above a certain price threshold, give rise to problems of equilibrium multiplicity and non-existence. 

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