NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Steffen Meyer

Leibniz Universitaet
Koenigsworther Platz 1
30167 Hannover
Germany

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NBER Working Papers and Publications

November 2017Who Falls Prey to the Wolf of Wall Street? Investor Participation in Market Manipulation
with Christian Leuz, Maximilian Muhn, Eugene Soltes, Andreas Hackethal: w24083
Manipulative communications touting stocks are common in capital markets around the world. Although the price distortions created by so-called “pump-and-dump” schemes are well known, little is known about the investors in these frauds. By examining 421 “pump-and-dump” schemes between 2002 and 2015 and a proprietary set of trading records for over 110,000 individual investors from a major German bank, we provide evidence on the participation rate, magnitude of the investments, losses, and the characteristics of the individuals who invest in such schemes. Our evidence suggests that participation is quite common and involves sizable losses, with nearly 6% of active investors participating in at least one “pump-and-dump” and an average loss of nearly 30%. Moreover, we identify several distinct...
Fresh Air Eases Work – The Effect of Air Quality on Individual Investor Activity
with Michaela Pagel: w24048
This paper shows that air quality has a significantly negative effect on the likelihood of individual investors to sit down, log in, and trade in their brokerage accounts controlling for investor-, weather-, traffic-, and market-specific factors. In perspective, a one standard deviation increase in fine particulate matter leads to the same reduction in the probability of logging in and trading as a one standard deviation increase in sunshine. We document this effect for low levels of pollution that are commonly found throughout the developed world. As individual investor trading can be a proxy for everyday cognitively-demanding tasks such as office work, our findings suggest that the negative effects of pollution on white-collar work productivity are much more severe than previously though...
 
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