Price Manipulation by Intermediaries

Serkan Imisiker (), Rasim Ozcan and Bedri Tas

Emerging Markets Finance and Trade, 2015, vol. 51, issue 4, 788-797

Abstract: In this study, we investigate two main research questions using unique individual trade level data from the Istanbul Stock Exchange (ISE; renamed Borsa Istanbul in January 2013): (1) Do brokers conduct manipulative trades in the ISE? (2) Do these brokers gain returns from their manipulative behavior? We examine the trade-based “pump-and-dump” price manipulation scheme. Using the complete intraday trading history of stocks listed on the ISE over the 2003–6 period, we find that a significant percent of the trades conducted by brokers can be identified as consistent with the pump-and-dump price manipulation scheme, and brokers that conduct more pump-and-dump trades earn marginally higher profits.

Date: 2015
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DOI: 10.1080/1540496X.2015.1046349

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