After registering significant declines in 2015, the prices of non-renewable commodities rebounded during the first four months of 2016 resulting in a key question for many countries and economic stakeholders: can November 2015 be regarded as the low point of the cycle, suggesting a markets recovery, if not sustained, at least sustainable? The hypothesis seems reasonable, but recent crude oil developments have shown that the precautionary principle must prevail when attempting to pre ...