Futures trading volume as a determinant of prices in different momentum phases

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Recent studies contend that trading volume has predictive power for ex ante stock prices, particularly small stocks that do not react quickly to macroeconomic information. This study postulates that a significant amount of macro-information that flows on to stock markets is derived from derivative markets. We examine the impact of short-term futures trading volume and prices on cash stock prices using a case study of 15-min data from the Australian stock index futures market which reports actual trading volume. After applying vector error correction modelling (VECM), variance decomposition and impulse functions, we conclude that futures prices provide a short-term information lead to stock prices that dominates trading volume effects. We also observe asymmetric changes in the impact of trading volume between bull and bear price momentum phases and after large trading volume shocks. These results suggest that, in future, studies on trading volume should control for the cross-correlation impact from derivative prices and the differential impact of trading phases.
Futures trading volume , Stock and futures prices , Multivariate causality , Price momentum phases
Hodgson, Allan and Mohammed Masih, Abul Mansur and Masih, Rumi. (2004). Futures trading volume as a determinant of prices in different momentum phases. International Review of Financial Analysis, 15, pp. 68 - 85.
Elsevier Inc.

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