IHSG Session 1 Slumps 3.08%, Mining and Energy Stocks Crumble

Jakarta, KOMPAS.com - The Jakarta Composite Index (IHSG) closed under heavy pressure during the first trading session on Tuesday (19 May 2026). The index fell sharply by 3.08 percent to 6,396. The weakness in the first session was mainly driven by sell-offs in mining and energy sector shares. PT Indika Energy Tbk (INDY) led the declines with a 14.7 percent drop. Followed by PT Timah Tbk (TINS) down 14.36 percent, PT Petrindo Jaya Kreasi Tbk (CUAN) down 12.0 percent, and PT Amman Mineral International Tbk (AMMN) down 10.1 percent. Pressures on those commodity stocks weighed on the basic Materials and Energy sectors, which weakened into midday. Corrections were observed across nearly all sector indices. According to data from the Indonesia Stock Exchange (BEI), the IHSG opened at 6,599.213 and briefly touched a high of 6,635.127 before sliding to a low of 6,376.343. Turnover was substantial, amounting to Rp 15.131 trillion, with a trading volume of 27.962 billion shares and a turnover frequency of 1.73 million. Market capitalisation of the Indonesia Stock Exchange (BEI) fell to Rp 11,160 trillion. On the other hand, most Asian indices were in the green as falling global oil prices began to ease global investor concerns. However, the Tokyo and Seoul stock exchanges were still in the red by midday, indicating that pressure in the Asia region has not fully abated.