Throughout the battle over who or what caused crude oil to spike to $147 per barrel last year CME Group and Intercontinental Exchange (ICE) have consistently contended that despite the bluster from certain members of Congress and analysis of self appointed experts, there has been no empirical study that linked the spike to speculators or the positions held by commodity index funds.
Whether that claim can still be made or not is debatable as Rice University just released a paper calling previous Commodity Futures Trading Commission (CFTC) studies that showed excess speculation was not responsible, flawed.

