WCI Markets: CCAs push higher from rulemaking workshop and into options expiry, Washington reserve sale size boosts secondary market

California Carbon Allowance (CCA) prices rallied through a packed week of activity including a cap-and-trade public workshop discussing plans to increase programme stringency, options expiry, and macro markets rallying after a pause in the US interest rate hiking cycle, while Washington Carbon Allowances (WCA) initially lurched higher on the announcement of a small reserve sale in August.