Vehicle Emissions Credits

A vehicle emissions credit is permission to be dirtier than the rules allow, sold by a carmaker that is cleaner than required to one that is not. It is not one market but a stack of overlapping ones, all created by regulation and all traded bilaterally between manufacturers, with no exchange, no public price, and no futures. An all-electric maker generates a surplus in every one; a maker of large combustion engines runs a deficit and must buy. The biggest seller for a decade was Tesla, for which credit sales were a core profit line.

In the US there are three stacked systems. ZEV credits come from California's Zero-Emission Vehicle mandate and the roughly a dozen "Section 177" states that adopt California's rules, requiring a rising share of each maker's sales to be electric. Federal greenhouse-gas credits come from the EPA's fleet CO2 standards, and CAFE credits from the separate NHTSA fuel-economy rules. A maker can be long one and short another. Europe runs its own version: binding fleet CO2 targets with heavy fines per gram over, which is why pooling arrangements, Tesla with Stellantis and Honda, Mercedes with Volvo and Polestar, became a quiet multi-hundred-million-euro trade.

Because the credits change hands manufacturer to manufacturer, often through brokers and under non-disclosure, there is no screen price the way there is for an EU allowance or even a RIN. Values surface only in company filings and the occasional disclosed pooling deal. The market is large, opaque, and entirely a creature of policy: when a US administration loosened the federal penalty or California's waiver was challenged, billions of dollars of credit value moved on the legal news alone. It is the clearest case in this group of a commodity that is real, valuable, and almost completely invisible.