“…They suggest that incorporating open interest with trading volume data may shed insight into the price effects of market activity generated by informed and uninformed traders. The empirical studies that follow show a significant, positive effect on volatility associated with trading volume, particularly in the oil futures market (e.g., Bessembinder and Seguin, 1993;Forster, 1995;Fung and Patterson, 2001;Lautier and Riva, 2008). Working (1953aWorking ( , 1953b, however, suggests that the line between a hedger and speculator might not be clear cut.…”