On August 25, 2015, the California Air Resources Board (ARB) released the results of its third joint auction for greenhouse gas (GHG) allowances between ARB and Québec's Ministry of Sustainable Development. The joint auction was held on August 18, 2015, which sold 2015 and 2018 vintage allowances available for use in both jurisdictions. Based on published auction results, all 73,429,360 metric tons of 2015 allowances were sold at a settlement price of $12.52 per metric ton, which was a 23 cent increase from the prior joint auction held in May 2015. In addition, all 10,431,500 vintage 2018 allowances that were sold at a settlement price of $12.30 per metric ton, which was a 20 cent increase from the May 2015 joint auction. The next joint auction is planned for November 17, 2015. The auction notice is available on the ARB Cap-and-Trade website.