The idea that speculation exacerbates commodity and stock price volatility dates back at least from the second half of the nineteenth century when an extensive literature emerged to which Marshall contributed. The essence of his arguments, originally applied to commodities and subsequently...

This study introduces a non linear model of commodity futures prices which accounts for the pressures due to hedging and speculative activities. The interaction with the corresponding spot market is considered assuming that a long term equilibrium relationship holds between futures and spot...

Over the 1990–2010 time period, a dynamic interaction between spot and futures returns in five commodity markets (copper, cotton, oil, silver, and soybeans) is empirically validated. An error correction relationship for the cash returns and a non-linear parameterization of the corresponding...

The interaction between rational hedgers and informed oil traders is parameterized and tested empirically with the help of a complex non linear smooth transition regime shift CCC-GARCH procedure. In spite of their gyrations, futures price changes are usually self-correcting. Well informed...