JCI Closes Down 1.33% at 5,863
The Jakarta Composite Index (JCI) ended Thursday, 15 October 2026, in negative territory. The index stood at 5,863.78, down 79.24 points, or 1.33%.
The JCI opened at 5,917.13, below the previous day’s closing level. Its high for the day was 5,917.70, barely above the opening price, meaning the index failed to move higher after the start of the session. Selling pressure then dragged it down to a low of 5,804.21.
The index fell sharply from the opening, then briefly held in the 5,890–5,900 range before weakening again towards 10am WIB. Its steepest decline came at around 11am, when the JCI touched the 5,800 range. It then moved sideways between 5,805 and 5,850 through the afternoon. Towards the close, the index pared some of its losses, rising to 5,863.78, around 59.6 points above the day’s low.
Trading volume reached 306.62 million lots, with transaction value totalling Rp10,250.65 billion, or around Rp10.25 trillion.
According to the Indonesia Stock Exchange (IDX), the decline reflected losses in 592 shares, while 252 were unchanged and only 119 rose.
Refinitiv data showed infrastructure was the biggest drag on the JCI, plunging 4.6%, followed by energy, down 2.7%, and industrial shares, which fell 2.4%.
The shares weighing most heavily on the index included PT Barito Renewables Energy Tbk (BREN), PT Dian Swastatika Sentosa Tbk (DSSA), PT Bank Central Asia Tbk (BBCA), PT Chandra Asri Pacific Tbk (TPIA) and PT VKTR Teknologi Mobilitas Tbk (VKTR).
Among the shares that helped cushion the decline were PT Amman Mineral Internasional Tbk (AMMN), PT Bank Mandiri (Persero) Tbk (BMRI), PT Bank Rakyat Indonesia (Persero) Tbk (BBRI), PT United Tractors Tbk (UNTR) and PT Bank of India Indonesia Tbk (BSWD).
Several events and economic data releases continued to weigh on Indonesia’s financial markets, including a speech by Federal Reserve Chairman Kevin Warsh at the IMF-World Bank meetings in Bangkok, Thailand.
Key market sentiment factors included:
- War developments: Houthis threaten to attack Saudi airports and oil facilities
Yemen’s Houthi group threatened to continue attacks on Saudi airports and oil facilities. The threat came a day after an attack reportedly damaged the complex of oil giant Saudi Aramco in Dhahran.
The Houthis described the facilities as legitimate targets and said the attack was retaliation for Saudi strikes in Yemen. The Saudi-led coalition said it had intercepted a ballistic missile heading towards Riyadh on Wednesday.
The escalation threatens Crown Prince Mohammed bin Salman’s ambitions to diversify Saudi Arabia’s economy and reduce its dependence on oil. In Yemen, intensifying fighting is also worsening the humanitarian crisis and disrupting the delivery of aid.
- US inflation heats up, dollar surges
The US released its September inflation data on Wednesday.
US inflation rose to 3.7% year-on-year in September 2026, up from 3.4% in the previous two months. The figure exceeded market expectations of 3.6%, driven by a surge in energy prices.
According to the US Bureau of Labour Statistics, petrol prices jumped 34.2% year-on-year, while heating oil prices soared 74.2%. Month-on-month, the US Consumer Price Index (CPI) rose 0.6%, its largest increase since April 2026. Petrol prices surged 9.1%, accounting for more than half of the monthly CPI rise.
Underlying price pressures were also evident in core CPI, which rose to 2.6% year-on-year from 2.4% in August. Core inflation increased 0.3% month-on-month, exceeding expectations of 0.2%.
Following the higher inflation reading, the dollar index surged, reaching 102.555 in Wednesday’s trading. It remained near its highest level since April 2025, around 18 months ago.
The dollar’s rise could weaken the rupiah amid the risk of outflows from emerging markets.
- China’s trade surplus reaches US$133 billion as exports surge 36%
China released September consumer and producer inflation data and trade figures on Wednesday. Its trade surplus rose sharply to US$133.53 billion in September 2026, up from US$88.72 billion in the same period last year. The figure exceeded market expectations of US$118.1 billion and was the second-largest surplus on record.
Data from China’s General Administration of Customs showed exports surged 36.3% year-on-year to US$447.18 billion.
Car exports also rose sharply. Shipments to the United States increased 39.6%, while exports to the European Union grew 25.3% and those to ASEAN countries jumped 52.3%.
China’s imports also surged 31% year-on-year to a record US$313.66 billion, exceeding market expectations of 24.5%.
China’s cumulative trade surplus reached US$938.11 billion in January–September 2026, raising the prospect that the annual surplus could once again exceed last year’s record of US$1.2 trillion.
The improvement in China’s trade balance, particularly the rise in imports, is positive news for Indonesia. China is Indonesia’s main trading partner, and higher imports are expected to boost demand for Indonesian goods.
- China inflation
China’s inflation rose to 0.9% year-on-year in September 2026, from 0.8% in August. The increase was driven by transport costs and energy prices, although it remained below market expectations of 1%.
China’s CPI rose 0.2% month-on-month in September 2026. Since 1996, monthly Chinese inflation has averaged 0.14%, with a record high of 2.6% in February 2008 and a low of minus 1.8% in June 1998.
Meanwhile, producer price inflation surged to 5%, its highest level since June 2022, from 3.8% in August. Higher fuel prices and production costs drove price pressures in the industrial sector.
- Discussion between the Fed chair and IMF managing director
The IMF-World Bank meetings in Bangkok, Thailand, included an important event on Thursday, 15 October 2026: a fireside chat between International Monetary Fund Managing Director Kristalina Georgieva and Federal Reserve Chairman Kevin Warsh.
The discussion, scheduled for 10.30am WIB, could offer clues about the global economic outlook, inflation pressures, the direction of US interest rates and global debt risks.
Warsh’s remarks are being closely watched by market participants because they could influence expectations for Fed monetary policy, the US dollar, US Treasury yields and gold prices. For Indonesia, signals of tighter Fed policy could put pressure on the rupiah and trigger capital outflows from emerging markets, while a more dovish tone could support risk assets.
- US producer inflation
On Thursday, 15 October 2026, the US was due to release its producer price index (PPI) data for September 2026. In August, PPI inflation rose 0.4% month-on-month, its sharpest increase in three months, driven by higher prices for goods, including diesel.
Year-on-year producer inflation rose to 5.4% in August 2026 from 4.8% in July, mainly owing to higher transport costs.