Flooring Guide by Cinvex — The Bisnis-27 Index opened the week on a cautious note, dipping to 438.43 on Monday (May 25, 2026). The early session decline was largely driven by heavy selling in commodity and energy-related stocks, including BUMI, TAPG, and DEWA.
According to IDX Mobile data, as of 9:05 AM WIB, the index—a joint venture between the Indonesia Stock Exchange and Harian Bisnis Indonesia—slipped by 0.35 points, or 0.08%, settling at 440.74. Market breadth was negative, with 16 constituent stocks trading in the red, nine advancing, and two remaining unchanged.
Energy and commodity players faced the steepest selling pressure. PT Bumi Resources Tbk. (BUMI) led the decline, dropping 5.41% to Rp175, followed by PT Triputra Agro Persada Tbk. (TAPG), which fell 4.94% to Rp1,540, and PT Darma Henwa Tbk. (DEWA), which slid 4.76% to Rp360. Further downward pressure came from PT Medco Energi Internasional Tbk. (MEDC), down 4.10% to Rp1,285, and PT Alamtri Resources Indonesia Tbk. (ADRO), which corrected by 2.55% to Rp2,290.
Despite the broader market weakness, the banking sector emerged as a vital anchor for the index. Major lenders posted solid gains, led by PT Bank Rakyat Indonesia (Persero) Tbk. (BBRI), which rose 1.97% to Rp3,110, and PT Bank Central Asia Tbk. (BBCA), which climbed 1.69% to reach Rp6,000. Other notable performers included PT Kalbe Farma Tbk. (KLBF) at 1.25%, PT Bank Mandiri (Persero) Tbk. (BMRI) with a 0.97% increase, and PT Bank Negara Indonesia (Persero) Tbk. (BBNI), which rose 0.79%. Additionally, PT Bumi Resources Minerals Tbk. (BRMS) stood out as a top performer, surging 4.76% to Rp600.
Analysts at Phintraco Sekuritas noted that global sentiment remains tethered to geopolitical tensions between the U.S. and Iran, particularly concerning the Strait of Hormuz and its subsequent impact on international oil prices. While U.S. President Donald Trump suggested that a deal to reopen the strait was in progress, these claims were promptly refuted by Iranian state media, which reported that dozens of vessels continue to traverse the area under Iranian supervision.
“The ongoing uncertainty surrounding the U.S.-Iran negotiations and the direct correlation to oil price volatility will continue to influence global market movements,” Phintraco Sekuritas stated in their latest research report.
Looking ahead, market participants are bracing for a busy week of U.S. economic data, including the PCE price index, durable goods orders, and the second estimate of Q1 2026 GDP growth. Domestically, investors are expected to maintain a cautious stance as they navigate the upcoming MSCI rebalancing at the end of May and a shorter-than-usual trading week. Compounding this sentiment, market participants remain watchful of policy ambiguities from the government.
“From a technical perspective, the Composite Stock Price Index (IHSG) is expected to trade with a mixed bias within the 6,000 to 6,250 range throughout this week,” concluded Phintraco Sekuritas.
Disclaimer: This news article is intended for informational purposes only and does not constitute a recommendation to buy or sell securities. All investment decisions are the sole responsibility of the reader. Bisnis.com is not liable for any losses or gains resulting from investment decisions made based on this content.
Summary
The Bisnis-27 Index opened the week with a slight decline to 438.43, primarily driven by significant selling pressure in energy and commodity stocks. PT Bumi Resources Tbk. (BUMI), PT Triputra Agro Persada Tbk. (TAPG), and PT Darma Henwa Tbk. (DEWA) led the downward movement, while market sentiment remained cautious due to ongoing geopolitical tensions between the U.S. and Iran.
Despite the broader market weakness, the banking sector provided support to the index with gains from major lenders such as BBRI and BBCA. Analysts expect continued market volatility influenced by global economic data, upcoming MSCI rebalancing, and uncertainty regarding international oil prices. The Composite Stock Price Index is projected to maintain a mixed trading bias throughout the week.