Once certificates are delivered into your registry account, the system needs to value them daily. The question is: against what?
The simplest approach is to use the spot price published by the exchange. This gives you a mark-to-market that reflects what you could sell the certificates for today. For some desks, this is perfectly adequate.
Spot tells you what inventory is worth now. That is not always the same as what matters most.
But many emissions trading desks particularly those that plan to hold inventory until a specific compliance deadline or settlement window prefer to value against a particular futures tenor. The most common choice is the December contract of the current calendar year. If you are in 2026 and you plan to surrender or sell your allowances before year-end, then the December 2026 settlement price is a more meaningful benchmark for your inventory than today’s spot.
This is not a theoretical distinction. The spread between the spot price and the December contract can be material, and it moves. A desk that values inventory against spot will see different daily P&L movements than a desk that values against December and both can be correct, because they are answering different questions. Spot valuation tells you what the inventory is worth right now. Tenor-based valuation tells you what it is worth relative to when you intend to act on it.
Different valuation methods produce different numbers and that can be entirely correct.
A good emissions ETRM should give the desk the flexibility to choose. Select a tenor, and the system prices your entire inventory against that contract’s daily settlement price. Change your mind mid-year perhaps because you’ve decided to hold into 2027 and switch to the December 2027 contract instead. The system recalculates, and your daily MTM, month-to-date, and year-to-date figures update accordingly.
The right system does not force one valuation view. It lets the desk choose the one that matches intent.
The inventory screen itself should show injections and withdrawals what came in, what went out grouped by date, book, strategy, or counterparty. Each movement should be traceable to the physical trade that generated it. And the net position should be valued using the chosen method, with the daily change clearly reported so that the risk office can include it in their P&L overview.
Flexibility is only useful if the audit trail stays intact.
This level of flexibility might sound like a nice-to-have. For a desk holding significant inventory through a compliance cycle, it is anything but.
Next week: are your exchange fees and rebates captured at trade level on the day or adjusted at month-end?
