Inp.polri.go.id - Jakarta. The Indonesia Stock Exchange (IDX) saw the Composite Stock Price Index (IHSG) opened lower on Monday (6/4/2026) as investors reacted to heightening geopolitical friction between the United States and Iran.

"The market is currently bracing for potential volatility as the index tests critical support levels between 6,900 and 7,000," said Phintraco Sekuritas Head of Research Ratna Lim., as cited by antaranews.com.

The downturn followed a stern warning from the U.S. administration regarding the Monday deadline for reopening the Strait of Hormuz, sparking fears of a major military escalation. Analysts warned that a prolonged conflict could keep crude oil prices elevated, potentially widening Indonesia’s budget deficit due to increased fuel subsidies and triggering further Rupiah depreciation.

Domestically, traders navigated new transparency regulations regarding high shareholding concentrations, which may cause short-term fluctuations in low-liquidity stocks. While regional Asian markets showed mixed results, the local bourse remained cautious ahead of key economic data releases later this week, including national foreign exchange reserves and U.S. inflation figures.

(mg/inp/pr/rs)