Rupiah Slips to Rp17,918 Against Dollar Amid Oil Price Surge Following Saudi Aramco Attack
Indonesia's currency weakened 0.10 percent to Rp17,918 per US dollar on Wednesday as escalating attacks on Saudi energy infrastructure drove global crude prices sharply higher, offsetting support from softening US monetary policy signals.
Rupiah Weakens to Rp17,918 per Dollar as Global Oil Prices Rise
Indonesia's rupiah depreciated by 18 points—or 0.10 percent—to Rp17,918 per US dollar at the opening of trading on Wednesday, October 14, 2026, compared to the previous session's close of Rp17,900.
The currency faced downward pressure as global oil markets reacted to renewed attacks on Saudi Arabian energy infrastructure. Yemen's Ansarullah group targeted an administrative building belonging to Saudi Aramco in Dhahran on Tuesday night, according to Saudi Arabia's Ministry of Energy. Emergency response teams extinguished a small fire, with no injuries or fatalities reported.
Escalating Strikes on Saudi Energy Infrastructure
The incident is part of a broader pattern of strikes affecting Saudi oil production. A refinery at Jazan in western Saudi Arabia has remained shuttered since an earlier attack during the current escalation. Recent days have also seen attacks on airports across the kingdom, resulting in at least 18 fatalities and hundreds of injuries. The escalation follows warnings from the Saudi-led coalition to evacuate areas near Houthi-controlled oil sites in Sanaa, triggering retaliatory threats and strikes on Saudi energy facilities.
Oil Prices Surge on Supply Concerns
Market analyst Lukman Leong of Doo Financial noted that the rupiah is expected to consolidate with limited weakening potential, pressured by the renewed surge in crude prices. West Texas Intermediate crude for November delivery climbed US$1.89, or 2.06 percent, to US$93.74 per barrel on the New York Mercantile Exchange. Brent crude for December delivery—the global benchmark used in approximately 70 percent of world oil trade—rose US$1.93, or 1.84 percent, to US$106.65 per barrel on London's ICE Futures Exchange.
The current Brent price reflects a sustained rally throughout 2026, with the commodity up approximately 72 percent year-over-year. While elevated, the price remains below the 52-week peak reached in April 2026, when Brent traded above US$138 per barrel before retreating.
Dollar Weakness Provides Partial Support
Despite oil-related headwinds, the rupiah received support from a correction in the US dollar index and declining US Treasury yields. John C. Williams, President and Chief Executive Officer of the Federal Reserve Bank of New York and permanent member of the Federal Open Market Committee, signaled a dovish monetary policy outlook. Williams indicated he expects a single interest rate increase this year but sees no need for further hikes in 2027.
Volatility Continues After Turbulent Year
The rupiah's current level represents continued volatility after a turbulent year. The currency has fluctuated between a low of Rp16,675 per dollar on January 1, 2026, and a high of Rp18,314 on July 15, 2026, meaning Wednesday's rate reflects partial recovery from mid-year weakness.
Market participants remain cautious ahead of tonight's release of US inflation data. Core inflation is projected to accelerate from 2.4 percent to 2.5 percent, while headline inflation is expected to rise from 3.4 percent to 3.6 percent. Analysts forecast the rupiah will trade in a range between Rp17,850 and Rp17,950 per US dollar in the near term.