Jakarta Composite Index Opens First Session 0.30% Higher at 6,639 Level
Jakarta, CNBC Indonesia – The Jakarta Composite Index (IHSG) strengthened at the opening of trade on Tuesday (8/9/2026). The index rose 19.84 points, or 0.30%, to a level of 6,639.51.
According to data from the Indonesia Stock Exchange, the IHSG continued to climb higher three minutes after the market opened, with a temporary high of 6,650.87 and a low of 6,636.93. A total of 276 shares advanced, 63 declined, and 303 were unchanged.
Trading volume at the start of the session reached 280.71 million shares, with a transaction value of around Rp 131.57 billion.
Market sentiment today is expected to be mixed after economic data released yesterday showed an improvement in Indonesia’s external resilience. National foreign exchange reserves rose again, providing support for rupiah stability amid global market uncertainty.
Market participants’ attention today will shift to Japan’s economic growth, China’s trade performance, and developments in the United States labour market.
This series of data has the potential to influence movements in the yen, yuan, US dollar, commodity prices, as well as the direction of the rupiah and the Indonesian stock market throughout the trading day.
On the domestic front, the reopening of Soekarno-Hatta Airport and the declining activity of Mount Anak Krakatau are positive developments.
Indonesia’s foreign exchange reserves rose to US$146.5 billion in August, from US$145.3 billion in July, according to data released yesterday, Monday, 7 September 2026, at 10.00 WIB.
The increase of US$1.2 billion brought Indonesia’s foreign exchange reserves to their highest position since March.
The improvement was primarily supported by tax and service revenue as well as the government’s withdrawal of foreign loans.
The additional reserves were sufficient to offset the needs of foreign debt payments and rupiah stabilisation measures undertaken by Bank Indonesia amid global financial market uncertainty.
The level of foreign exchange reserves is equivalent to financing approximately 5.4 months of imports, or 5.3 months of imports and payments of the government’s external debt.
Meanwhile, Asia-Pacific stock markets moved in varied directions in Tuesday’s trading (8/9/2026), amid rising geopolitical tensions after the United States and Iran launched attacks against each other.
Quoting CNBC, South Korea’s Kospi index rose 0.75% in early trading, while Japan’s Nikkei 225 fell 0.95% and Australia’s S&P/ASX 200 weakened 0.22%.
Market movements were overshadowed by a surge in crude oil prices, which reached their highest level in six weeks on Monday night after the US and Iran attacked each other over the weekend. Brent crude rose 1.1% to US$97.31 per barrel, whilst West Texas Intermediate (WTI) futures gained 1.3% to US$92.66 per barrel.
Crude oil prices have surged over the past month as the US-Iran war continues. The rise in energy prices has heightened market participants’ concerns about higher inflation and could put pressure on US government bond yields.
The yield on the 10-year US Treasury bond rose last week to its highest level since November 2023. Meanwhile, the two-year Treasury yield reached its highest level since January 2025.