The hidden cost of getting fees wrong
For market makers and high-volume emissions desks, cost is not a rounding error. Exchange fees, clearing commissions, and broker fees are charged on every trade. For a desk executing thousands of trades a month, the total cost line is significant and getting it wrong means the P&L the trader sees every day is misleading.
The particular challenge in emissions markets is tiered rebates. Exchanges like ICE offer volume-based discounts: exceed a certain trading threshold in a calendar month and your per-trade fee drops, sometimes substantially. The problem is that the tier you qualify for is only known at the end of the month, once all volume has been tallied. You cannot apply the exact rebate at the point of trade.
Most desks handle this in one of two ways, and both are bad. The first is to ignore the rebate entirely in the daily P&L and apply a lump-sum correction at month-end. This means the P&L is overstating costs every single day for the entire month, and then suddenly jumps when the adjustment lands sometimes in the following month, because invoices from exchanges and brokers typically arrive 20 to 50 days after the trading period closes. The second approach is to apply a rough estimate, which is frequently wrong in the other direction.
Invoices arrive 20–50 days after close
Exchange and broker invoices often land in the following month meaning P&L errors can sit uncorrected for weeks. A specific, standalone stat like this works well as a highlighted number or icon-accompanied callout block.
The better approach is to apply an agreed mid-tier rebate rate at trade level throughout the month. If the desk consistently trades at a volume that qualifies for a particular tier, the system can apply that tier’s rate to every trade as it is booked. The daily P&L will be close to the true number not exact, but far better than zero or a worst-case assumption. When the actual invoice arrives, the variance is small and manageable rather than a material surprise.
This requires the ETRM to support configurable fee and rebate structures at the trade level, with the ability to attribute costs to the correct book and strategy in real time. It also requires a cost reporting interface where the back office can see, for any date range, exactly what has been charged by fee type, by counterparty, by book and compare it to what the exchange or broker is invoicing.
Does your ETRM support this?
- Configurable fee and rebate structures at trade level
- Real-time cost attribution by book and strategy
- Reporting by fee type, counterparty, and date range
- Invoice comparison against captured trade costs
Without this, the trading desk is making decisions based on a P&L that is missing a material cost component, and the back office is spending days every month reconciling invoices against numbers that were never captured properly in the first place.
Next week: does your multi-leg option brokerage calculate automatically or is it a spreadsheet?
