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This paper examines the relationship between trading activity and returns volatility in white maize futures listed on … the South African Futures Exchange (SAFEX) and investigates the impact of speculative activity on volatility. Returns … volatility is estimated using a GARCH (1,1) model. Trading activity changes are observed by computing two negatively correlated …
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attempts to quantify the impact of STT imposition and subsequent revisions on volatility and trading volume during Oct 2003 …-July 2013. Empirical results show a mixed response of volatility and volume to changes in STT. Even though STT has …
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