Rupiah Weakens in Early September: What's Behind the Decline?
The Indonesian rupiah weakened by 22 points, or 0.12%, to Rp17,744 per US dollar on Tuesday. This decline was primarily attributed to rising global oil prices, which reached US$91 per barrel, influenced by escalating conflict between the U.S. and Iran. Woori Bank analyst Rully Nova noted that U.S. forces struck Iranian missile launchers on Larak Island on August 30, 2026, marking renewed military engagement. Additionally, rising U.S. inflation expectations and increased government bond yields contributed to the rupiah's depreciation, with the 10-year U.S. bond yield rising 5.8 basis points to 4.77 percent.
The rupiah's recent weakening to Rp17,744 per US dollar is a direct consequence of geopolitical tensions and their impact on global commodity and financial markets. Rising oil prices to US$91 per barrel, fueled by the U.S.-Iran conflict, directly increase Indonesia's import costs, placing downward pressure on the currency. This dynamic is critical for Indonesian startups and tech companies reliant on imported hardware or cloud services priced in U.S. dollars, as their operational expenses will rise. Further pressure comes from U.S. inflation expectations and rising bond yields. The 10-year U.S. government bond yield climbing to 4.77 percent makes dollar-denominated assets more attractive, potentially drawing capital away from emerging markets like Indonesia. For the broader Southeast Asian tech sector, this points to increased caution from international investors, who may prioritize safer, higher-yield U.S. investments over regional ventures in a period of heightened global instability.
