Northeast U.S. carbon dioxide emissions prices return to last year’s highs

The most recent auction of carbon dioxide CO2 emissions allowances in the major U.S. northeast regional trading hub reached near record-high prices, as the number of allowances available was reduced. The latest Regional Greenhouse Gas Initiative (RGGI) quarterly auction, held September 6, 2023, resulted in a clearing price of $13.85 per ton for CO2 emissions allowances, surpassing the previous quarter’s clearing price by 9% and nearing the record price, $13.90 per ton, set in March 2022. Allowance prices have been increasing since RGGI’s March 2023 auction as fewer allowances have been made available over time.