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Impact of short selling restrictions on informed momentum trading: Australian evidence

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  • Gao, Yang
  • Leung, Henry

Abstract

We examine the impact of short selling restrictions on the momentum strategy returns of Australian equities during the Global Financial Crisis (GFC). Momentum strategy is based on a long position in a winner portfolio comprising of the previous 10% best-performing stocks and a short position in a loser portfolio comprising of the previous 10% worst-performing stocks. We find that momentum strategy during the GFC are less profitable compared to the pre-GFC period. Momentum returns are negatively correlated to the short sales restrictions, and that loser portfolios rather than winner portfolios drive this result. These momentum returns are robust to transaction costs and liquidity effects. An explanation is that the imposition of the short selling restrictions by the Australian Securities and Investments Commission from September 2008 to May 2009 may have moderated the ability for momentum traders to profit from the short sale of loser portfolios. However, informed momentum profits are attributable to the loser portfolio across the holding periods of 3 to 12months, which implies that informed institutional traders take advantage of their private information to overcome adverse selection costs. This enables them to short sell their loser portfolios and carry out their momentum trading strategies.

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  • Gao, Yang & Leung, Henry, 2017. "Impact of short selling restrictions on informed momentum trading: Australian evidence," Pacific-Basin Finance Journal, Elsevier, vol. 45(C), pages 103-115.
    • Handle: RePEc:eee:pacfin:v:45:y:2017:i:c:p:103-115
    DOI: 10.1016/j.pacfin.2016.12.009
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    Cited by:

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    2. Syed Riaz Mahmood Ali, 2022. "Do momentum and reversal matter in the Singapore stock market?," Asia-Pacific Journal of Accounting & Economics, Taylor & Francis Journals, vol. 29(6), pages 1692-1708, November.
    3. Cashman, George D. & Harrison, David M. & Sheng, Hainan, 2022. "Short sales, short risk, and return predictability in Asia-Pacific real estate markets," Pacific-Basin Finance Journal, Elsevier, vol. 73(C).
    4. Dongcheol Kim & Byeung‐Joo Lee, 2023. "Shorting costs and profitability of long–short strategies," Accounting and Finance, Accounting and Finance Association of Australia and New Zealand, vol. 63(1), pages 277-316, March.

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