Rancak Media – JAKARTA — The Jakarta Composite Index (JCI), locally known as IHSG, concluded Tuesday’s trading session (May 12, 2026) on a weaker note, settling at 6,858.89. The broader index’s downturn was predominantly driven by significant corrections observed in several prominent big-cap stocks, notably including BREN, BYAN, and ASII, signaling a challenging day for the Indonesian stock market.
According to data from the Indonesia Stock Exchange (IDX), the JCI experienced a notable decline of 0.87%, shedding 46.70 points to close at 6,858.89. The day began with the composite index opening at 6,949.84, and it briefly touched an intraday high of 6,977.28 before succumbing to selling pressure throughout the session.
Market breadth painted a clear picture of the prevailing bearish sentiment, with 463 stocks registering declines, significantly outweighing the 207 stocks that managed to strengthen. Another 151 stocks remained stagnant. Amidst this downturn, the total market capitalization stood at Rp12,171 trillion.
Among the beleaguered big-cap stocks, only a select few managed to defy the negative trend. PT Dian Swastatika Sentosa Tbk. (DSSA) recorded a gain of 2.64%, with its shares rising to Rp1,165. Similarly, PT Bank Negara Indonesia (Persero) Tbk. (BBNI) saw a positive movement, growing 2.36% to reach Rp3,910 per share.
Conversely, the deepest correction within the big-cap segment was borne by PT Barito Renewables Energy Tbk. (BREN), which plummeted 4.75% to Rp3,610 per share. This sharp drop contributed significantly to the overall index decline, highlighting investor concerns in this key sector.
Following BREN’s substantial dip, PT Bayan Resources Tbk. (BYAN) also experienced a notable downturn, falling 3.80% to Rp11,400 per share. Adding to the bearish sentiment among blue-chip counters, PT Astra International Tbk. (ASII) recorded a weakening of 3.31%, with its shares closing at Rp5,850.
In a broader market view, today’s top gainers showcased remarkable resilience against the overall market weakness. PT Nusantara Almazia Tbk. (NZIA) surged an impressive 30.82% to Rp191, while PT Krida Jaringan Nusantara Tbk. (KJEN) also saw significant growth, climbing 24% to Rp155 per share.
On the other end of the spectrum, the day’s top losers included PT UBC Medical Indonesia Tbk. (LABS), which dropped 14.81% to Rp184. PT Pyridam Farma Tbk. (PYFA) also faced a substantial contraction, decreasing 14.74% to settle at Rp324 per share, reflecting intense selling pressure on these stocks.
The market’s struggles were evident even earlier in the day, as the JCI had already closed down 1.43% or to the 6,807 level by midday. Since the trading session commenced, the index continuously grappled with downward pressure, largely due to a widespread selling spree affecting several stocks with jumbo market capitalizations.
Research from Mirae Asset Sekuritas Indonesia underscored that a number of heavyweight stocks were the primary contributors to the burden on the index. Shares of telecommunications issuer PT Mora Telematika Indonesia Tbk. (MORA) plunged a significant 15.0%. This was followed by PT Barito Renewables Energy Tbk. (BREN), an issuer owned by conglomerate Prajogo Pangestu, which saw a correction of 3.7% during the first session.
Further exacerbating the pressure on the index was the weakening performance of other prominent blue-chip stocks. PT Astra International Tbk. (ASII) experienced a 2.06% decline, and PT Bank Central Asia Tbk. (BBCA) weakened by 1.2% by the close of the first session, indicating broad-based selling impacting market leaders.
From a sectoral perspective, almost all sectoral indexes found themselves entrenched in the red zone, highlighting the pervasive market weakness. The industrial and infrastructure sectors emerged as the two sectors with the deepest corrections, signaling particular vulnerability in these areas.
“Only the transportation stock index managed to stay positive, while the industrial and infrastructure indexes led the weakening among all sectoral indexes,” stated Mirae Asset Sekuritas in its daily research publication on Tuesday (May 12, 2026), summarizing the day’s widespread downturn.
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Summary
The Jakarta Composite Index (JCI) concluded Tuesday’s trading session (May 12, 2026) on a weaker note, settling at 6,858.89, marking a 0.87% decline. This downturn was primarily driven by significant corrections observed in several prominent big-cap stocks. Market breadth reflected a widespread bearish sentiment, with 463 stocks declining against 207 that strengthened.
Among the big-cap stocks, PT Barito Renewables Energy Tbk. (BREN) plummeted 4.75%, followed by PT Bayan Resources Tbk. (BYAN) which fell 3.80%, and PT Astra International Tbk. (ASII) weakening 3.31%. From a sectoral perspective, almost all indexes were in the red, with industrial and infrastructure sectors experiencing the deepest corrections, while only the transportation stock index managed to stay positive.
