Group 1 - COMEX gold inventory recorded at 1220.24 tons on September 18, an increase of 1.52 tons from the previous trading day [1][2] - COMEX gold price closed at $3678.20 per ounce on September 18, down 0.44%, with an intraday high of $3707.30 and a low of $3660.50 [1][2] Group 2 - Canadian and Mexican leaders committed to closely coordinate before high-risk trade agreement reviews with the U.S. next year, amid U.S. President Trump's tariff threats [2] - The meeting in Mexico City marked a strengthening of Canada-Mexico relations, with both leaders seeking to persuade Trump to lower import tariffs on steel, automobiles, and agricultural products [2]