RGGI carbon allowance prices rose to a five-week high in recent trading, breaking through the $22 per tonne mark. Market analysts attributed the rally to multiple factors, including a rebound in power sector demand ahead of the heating season, expectations of tighter auction supply and stronger natural gas prices. Data showed RGGI market participants actively adjusting their positions, with some emitters locking in allowances early for winter compliance. Meanwhile, RGGI member states are advancing a new round of project spending reviews, with the market watching whether upcoming auction announcements will adjust the pace of allowance supply.