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On the Usefulness of Trading Volume as a Trading Indicator

  • Asset Management Review
  • Abbr : AMR
  • 2024, 12(1), pp.1~30
  • Publisher : Institute of Management Research, SungKyunKwan University
  • Research Area : Social Science > Business Management > Finance
  • Received : October 4, 2023
  • Accepted : January 16, 2024
  • Published : June 30, 2024

Yeong Jun Kim 1 Sang Been Yim 1 Kisung Yang 1

1숭실대학교

Accredited

ABSTRACT

This paper aims to investigate the usefulness of trading volume in terms of investment strategy in the KOSPI market. We construct the long-short portfolios which buy stocks with strong net buying and sells stocks with weak net-buying by an investor group. We consider three types of investor groups (domestic retail, domestic institutional, and foreign investors) and employ seven kinds of net-buying strength measures, including those proposed by previous studies. Unlike most previous studies whose net-buying measures are calculated from long-term (more than 6 months) or short-term (less than 1 month) trading data, we apply medium-term (1-3 months) trading data reflecting the trading volume contributions and average stock holding periods of each type of investors in the KOSPI market. The main findings are as follows. First, the portfolios following retail investors’ net-buying show significant alphas regardless of the choice of the net-buying measures, sample period, and portfolio holding period. On the other hand, the portfolios following foreign investors’ net-buying produce negative alphas for most cases. The portfolios following institutional investors’ net-buying exhibit insignificant alphas. Second, the results is closely related to the reversal trading patterns of retail investors and the reversal phenomenon in the KOSPI market. Lastly, with net-buying strength measures calculated from long-term sample period, the portfolios following foreign investors’ net-buying shows the highest performances similar to previous studies. This implies that the net-buying strength measures with sample period consistent to the stock holding period have significance as trading indicators.

Citation status

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