See the article: Jens Krause: (2011) Artificial market risks in the European carbon market and their implications
http://www.usaee.org/usaee2011/submissions/OnlineProceedings/Krause%20(2011)%20Artificial%20market%20risks%20in%20the%20European%20carbon%20market%20and%20their%20implications_conference%20proceedings.pdf My above article concerning this topic "Artificial Risk" is derived from the terminology provided in Krause's paper which though is not related to the hedging instruments and exotic vehicles, but that definitely provides us with a new kind of risk in the market.