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Price Manipulation by Intermediaries

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  • Serkan İmişiker
  • Rasim Özcan
  • Bedri Kamil Onur Taş

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.

Suggested Citation

  • Serkan İmişiker & Rasim Özcan & Bedri Kamil Onur Taş, 2015. "Price Manipulation by Intermediaries," Emerging Markets Finance and Trade, Taylor & Francis Journals, vol. 51(4), pages 788-797, July.
    • Handle: RePEc:mes:emfitr:v:51:y:2015:i:4:p:788-797
    DOI: 10.1080/1540496X.2015.1046349
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    2. Eray GEMICI & Mehmet CIHANGIR & Emre YAKUT, 2017. "Islem Bazli Manipulasyon: Turkiye Ornegi," Ege Academic Review, Ege University Faculty of Economics and Administrative Sciences, vol. 17(3), pages 369-380.
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