Sell Price Price Adjustment (SPA)is one of the BSAD items. Its derivation is given in the System Operator’s BSAD Methodology Statement as

SPA = (Aggregated cost of negative reserve option fees + Aggregated cost of sales of Forward Contract option fees) / (Aggregated volume of negative reserve contracts + Contracted MWh associated with options for Forward Contracts sold)

For the avoidance of doubt, if the denominator of SPA is zero in any Settlement Period, then SPA will be set to zero in that period.

BSC defined definition

The amount sent by the Transmission Company as the ‘Sell Price Price Adjustment’ in accordance with Section Q6.3 of the BSC Code.