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Portfolio pumping: An examination of investment manager quarter-end trading and impact on performance

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  • Gallagher, David R.
  • Gardner, Peter
  • Swan, Peter L.

Abstract

Utilizing a database of daily institutional fund manager trades, we examine the contribution of strategic trading at quarter-end associated with potential 'portfolio pumping' or 'ramping up' of reported stock prices around quarter-ends. We provide the first direct evidence that active fund managers tend to purchase illiquid stocks on the last day of the quarter, in stocks in which they already hold overweight portfolio positions. Consistent with the way fund managers are evaluated, we found that the poor-performing managers display greater evidence of portfolio pumping. Both increased regulatory scrutiny and improvements to market microstructure design reduce the severity of stock price changes at quarter-ends.

Suggested Citation

  • Gallagher, David R. & Gardner, Peter & Swan, Peter L., 2009. "Portfolio pumping: An examination of investment manager quarter-end trading and impact on performance," Pacific-Basin Finance Journal, Elsevier, vol. 17(1), pages 1-27, January.
    • Handle: RePEc:eee:pacfin:v:17:y:2009:i:1:p:1-27
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    Cited by:

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    2. Duong, Truong X. & Meschke, Felix, 2020. "The rise and fall of portfolio pumping among U.S. mutual funds," Journal of Corporate Finance, Elsevier, vol. 60(C).
    3. Tālis J. Putniņš, 2012. "Market Manipulation: A Survey," Journal of Economic Surveys, Wiley Blackwell, vol. 26(5), pages 952-967, December.
    4. Kadıoğlu, Eyüp & Frömmel, Michael, 2022. "Manipulation in the bond market and the role of investment funds: Evidence from an emerging market," International Review of Financial Analysis, Elsevier, vol. 79(C).
    5. Marija Corluka & Edwin O. Fischer, 2014. "Forensic Finance: Market Abuse and Price Manipulation in Security Markets on the Trail," The Review of Finance and Banking, Academia de Studii Economice din Bucuresti, Romania / Facultatea de Finante, Asigurari, Banci si Burse de Valori / Catedra de Finante, vol. 6(2), pages 047-067, December.
    6. Ouyang, Liangyi & Cao, Bolong, 2020. "Selective pump-and-dump: The manipulation of their top holdings by Chinese mutual funds around quarter-ends," Emerging Markets Review, Elsevier, vol. 44(C).
    7. Foley, Sean & Kwan, Amy & Low, Siyuan Adrian & Svec, Jiri, 2018. "The rise before the close: Underwriter trading around SEOs," Journal of Empirical Finance, Elsevier, vol. 48(C), pages 221-235.
    8. Ray Ball & Xi Li & Lakshmanan Shivakumar, 2015. "Contractibility and Transparency of Financial Statement Information Prepared Under IFRS: Evidence from Debt Contracts Around IFRS Adoption," Journal of Accounting Research, Wiley Blackwell, vol. 53(5), pages 915-963, December.
    9. Dongyu Chen & Xiaolin Li & Fujun Lai, 2023. "Shill bidding in lenders’ eyes? A cross-country study on the influence of large bids in online P2P lending," Electronic Commerce Research, Springer, vol. 23(2), pages 1089-1114, June.
    10. Cristina Ortiz & Gloria Ramírez & Luis Vicente, 2015. "Mutual Fund Trading and Portfolio Disclosures," Journal of Financial Services Research, Springer;Western Finance Association, vol. 48(1), pages 83-102, August.
    11. Brown, Stephen J. & Sotes-Paladino, Juan & Wang, Jiaguo(George) & Yao, Yaqiong, 2017. "Starting on the wrong foot: Seasonality in mutual fund performance," Journal of Banking & Finance, Elsevier, vol. 82(C), pages 133-150.
    12. Plastun, Alex & Bouri, Elie & Havrylina, Ahniia & Ji, Qiang, 2022. "Calendar anomalies in passion investments: Price patterns and profit opportunities," Research in International Business and Finance, Elsevier, vol. 61(C).

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