IHSG Plunges Today, What Is Causing the Stock Market to Weaken?

The 6,000 level has now been left behind. IHSG plunged 2.59% on Monday (October 12, 2026), then IHSG today briefly fell another 1.74% early in Tuesday's session. By the end of session I, pressure eased and IHSG's decline today was only 0.42%. What is making the Indonesian stock market wobble?

Key Takeaways

• IHSG closed down 2.59% at 5,936.15 on Monday, then briefly fell 1.74% to 5,832.76 on Tuesday before narrowing to minus 0.42% at the end of session I.
• The triggers were layered: Houthi attacks on Saudi Arabia, Brent price at USD 106.65 per barrel, and concerns over Indonesia's MSCI status.
• CGS analysts project support at 5,745-5,840 and resistance at 6,030-6,130, so the index direction remains vulnerable.

How Many Percent Did IHSG Fall Today?

Tuesday (October 13, 2026), IHSG opened weaker by 0.36% at 5,914.98. According to CNBC Indonesia, the index then briefly touched 5,832.76, down 103.39 points or 1.74%, with transaction value of Rp2.64 trillion. The pressure then narrowed. Kontan noted IHSG closed session I at 5,911.46, down 24.68 points or 0.42%.

The previous day was much heavier. According to Antara, IHSG closed at 5,936.15, dropping 157.61 points or 2.59%, while the LQ45 index fell 1.79% to 690.90. 

Bloomberg Technoz noted the index briefly touched 6,128.72 in the morning, then was dragged down to nearly the daily low of 5,917. The energy sector plunged 5.88%, industrials 5.21%, and infrastructure 4.71%.

The data above is as of the end of session I, Tuesday, October 13, 2026, at 12:12 WIB. The final close may differ.

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Causes of IHSG Decline: War, Oil, and MSCI

Analysts do not point to a single culprit. Several pressures came at once.

Middle East conflict. According to CNBC Indonesia, Saudi Arabia was again attacked by Houthi missiles and drones on Monday (October 12, 2026). Riyadh International Airport remains closed after Saturday's attack that killed 13 people and injured more than 300. The conflict is said to be expanding from the US-Iran war.

Oil prices. Brent closed up USD 1.93, or 1.8%, at USD 106.65 per barrel, the highest since September 15. WTI also strengthened to USD 93.74. 

Prices this high generally weigh on oil-importing countries. Head of Research at Phintraco Sekuritas, Ratna Lim, cited Brent holding above USD 100 as one of the negative sentiments, as quoted by Antara.

MSCI issue. The market is watching the risk of Indonesia's status being downgraded from emerging market to frontier market. The lifting of the freeze on MSCI index changes is projected to occur only in the second half of 2027, said Phintraco Sekuritas analyst Desy Erawati. 

"The issues in the market are still related to MSCI," she told CNBC Indonesia. Liputan6 also included a prediction that MSCI will not yet lift the freeze on Indonesian stocks in November 2026.

Rupiah and foreign funds. The rupiah closed weaker by 0.08% at Rp17,899 per US dollar on Monday. According to Ratna Lim in an Antara report, the potential for continued net foreign selling and concerns over outflows from the bond market also limited IHSG's movement.

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Stocks and Sectors Pressuring the Index

When IHSG was near its lowest point this morning, the financial sector fell 1.05%, basic materials 0.89%, and technology 0.84%. CNBC Indonesia named BBRI, BBCA, TLKM, VKTR, and DSSA as drags. The supports included INDF, CUAN, TFCO, BIKE, and PTRO.

At the end of session I, Kontan noted JPFA, GOTO, and INKP were among the LQ45 stocks with the deepest declines.

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What Should Investors Watch?

Analyst projections are still divided, but most are cautious. The CGS International Sekuritas research team expects IHSG to move variably with a weakening bias, with support at 5,745-5,840 and resistance at 6,030-6,130, according to Infobanknews. 

Binaartha Sekuritas analyst Ivan Rosanova sees a short-term rebound opportunity after the index touches 5,850, as reported by Bernas. Such projections are not a guarantee of price direction.

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Conclusion

The latest IHSG is moving below 6,000 after a 2.59% correction on Monday, with early Tuesday session pressure briefly reaching 1.74% before narrowing. The Middle East conflict, oil prices, MSCI issue, and the rupiah are the main sentiments. Monitor the final close and geopolitical developments before making decisions.

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FAQ

1. How many percent did IHSG fall today?
As of the end of session I, IHSG fell 0.42% to 5,911.46. Early in the session, its decline briefly reached 1.74%.

2. What caused IHSG to weaken?
The sentiments cited by analysts include Houthi attacks, expensive oil, the MSCI issue, and a weakening rupiah.

3. Will IHSG rebound?
There is no certainty yet. Analysts only project support and resistance areas, and the direction still depends on geopolitics and MSCI news.

4. Why does MSCI affect the Indonesian stock market?
MSCI is a global index provider. A downgrade in market classification could affect foreign investor interest, so the issue continues to be monitored.

5. Do crypto assets also fall when IHSG plunges?
The sources I reviewed do not contain crypto data. Crypto prices move 24 hours a day based on their own factors, so check real-time prices before concluding.