Regional Greenhouse Gas Initiative (RGGI) CO2 allowances tumbled starting late Tuesday evening after President Donald Trump issued an executive order taking aim at state climate policies, roiling a market that was already burdened from the effects of Trump's sweeping tariffs and the resulting global market sell-off.
Trump's executive order, which he issued Tuesday afternoon, directs the US Department of Justice to review state and local climate laws that hamper the "use of domestic energy resources", specifically singling out California's cap-and-trade program. It is unclear whether the administration intends to target RGGI, the 10-state regional cap-and-trade program that aims to lower power plant CO2 emissions.
US attorney general Pamela Bondi is required to report on actions her office has taken against state laws within 60 days, according to the order.
As a result, RGGI allowances for December delivery traded down to as low as $16/short ton (st) on the Intercontinental Exchange (ICE) early Wednesday morning, nearly 26pc below the prior day's Argus assessment of $21.52/st.
RGGI did not directly address Trump's executive order, saying that member states "will continue to implement their CO2 Budget Trading Programs, including appropriate consideration of any federal actions."
New York, the program's largest member, said it is reviewing the order.
"The governor is committed to ensuring a clean, affordable and reliable energy grid in New York statem," the office of Governor Kathy Hochul (D) said.
But the RGGI market had seen a steep fall even before Trump's directive. December 2025 allowances plunged by 8pc to $21.75/st on 4 April, erasing much of their gains following the latest auction, which bolster bullish sentiment in the market. Those declines likely were a response, albeit delayed, to the president's announcement of larger-than-expected tariffs on 2 April, spurring a major sell-off in global equities markets that continued into the beginning of this week.
At the time, RGGI was one of the only US environmental markets that significantly felt the impact of the global economic fallout resulting from Trump's tariffs. California Carbon Allowances (CCA) slipped slightly on 4 April while the state's Low Carbon Fuel Standard credits surged after regulators advanced changes to the program. The renewable energy certificate (REC) markets had been on a downward trend since the end of last month following proposed changes to New Jersey's solar incentive program.
Participants likely have become more risk-averse in light of broader economic uncertainty brought on by the tariffs, letting go of their RGGI positions first to possibly shore up their positions elsewhere.
The program is in the midst of a review, which has been ongoing for more than four years and subject to multiple delays. In addition, updates on its progress have been sparse, leaving the market uncertain about the types of changes to expect, including a potentially more ambitious emissions cap stretching beyond 2030. The participation of Pennsylvania and Virginia, two major CO2 emitters, has also been a major source of uncertainty for participants.
Projected surges in electricity demand fueled by the expansion of power-hungry data centers, as well as state electrification and clean energy policies, had resulted in a bullish outlook for the RGGI market because of an expected increase in demand for allowances and in turn, higher prices. The results of the last auction in March appeared to reflect such sentiment as it cleared high enough to sell all of the allowances in the program's 2025 cost-containment reserve, along with the original 15.4mn offered allowances.
But with December 2025 allowances trading this afternoon around $18.50/t on ICE, about $1.50 above the reserve trigger price, it is evident that Trump's policies are dampening any bullish expectations in the short-term. The long-term impacts remain to be seen as the effects of the president's global trade war play out across markets and the results of the attorney general's report on state climate laws are released in the next couple of months.