Despite its aim, the European Trading Scheme (ETS) for carbon is widely regarded as an inefficient market. The initial design of the scheme has caused trading reactions that do not follow the pricing patterns of other, more efficient commodities.
Within ETS, it isn’t carbon’s price volatility that makes its market seem uncharacteristic of other commodities markets; commodity markets are often characterized by volatility. Instead, it is the fact that carbon’s price drivers are not so easily pinpointed and, therefore, its volatility seems arbitrary.