This paper evaluates how different types of speculation affect the volatility of commodities’ futures prices. We adopt … four indexes of speculation: Working’s T, the market share of non-commercial traders, the percentage of net long … speculators over total open interest in future markets, which proxy for long term speculation, and scalping, which proxies for …

linear feedback relationship between them during the sample period although speculation does not appear a significant driver …

This paper evaluates how different types of speculation affect the volatility of commodities’ futures prices. We adopt … four indexes of speculation: Working’s T, the market share of non-commercial traders, the percentage of net long … speculators over total open interest in future markets, which proxy for long term speculation, and scalping, which proxies for …

which dampen speculation. In 2008 and 2009 exchange rate changes were helpful in reducing the impact of the global financial …

introduction of variants future prices with a maturity 2,3 and 4 months supposed to capture the effect of speculation upon the … dynamic of oil prices and to show which variables (supply, demand… or speculation) are more influent in determining the … introduction of the future prices shows that speculation affects the real price of oil but not more than the supply and the demand …

indications of speculation by any group of traders via the positive feedback trading or rational destabilization; and (5) we do …