Macro headwinds continue to weigh on the Indonesian rupiah, with the US two-year yield above 4% alongside elevated oil prices and interest-rate differentials described as at historically low levels pressuring IDR against the dollar. The external backdrop has been compounded by a weakening current account, recorded at -1.1% of GDP in Q1, while fiscal risks linked to energy subsidies and softer underlying growth add to vulnerability. Growth in Q1 was driven by higher government consumption, contributing +1.3pp versus +0.4pp in Q4 2025.

Inflation risks are tilted to the upside as higher oil prices, a weaker rupiah and a closing output gap feed through, even as subsidies delay pass-through. Forecasts point to headline inflation averaging 3% in 2026, up from 1.9% in 2025, while GDP growth is seen at 5.3% versus 5.1% in 2025. BI tightening, including a 50bps hike in May and 12-month SRBI yields at 6.8%, offers some support, though two further 25bps BI increases are flagged as possible; a US–Iran de-escalation is cited as a potential catalyst for USD/IDR reversal.

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Persisting Macro and Domestic Pressures on the Rupiah

We see dominant macro headwinds continuing to pressure the Indonesian Rupiah in the coming weeks. Higher U.S. yields, with the 2-year Treasury note currently hovering around 4.1%, and elevated oil prices near $90 per barrel are strengthening the dollar. This environment makes it challenging to be bullish on the Rupiah right now.

The pressure is increasing due to domestic factors, including a deteriorating current account which posted a deficit of 1.1% of GDP in the first quarter of 2026. This is a significant shift from the surpluses seen in previous years and, combined with risks from energy subsidies, adds to the currency’s vulnerability. We are seeing the USD/IDR exchange rate test multi-year highs, approaching the 16,500 level.

Bank Indonesia is actively defending the currency, having already raised rates by 50 basis points this month and with the market pricing in at least two more 25 basis point hikes this year. This commitment to tightening provides some support for the Rupiah. However, investor confidence remains shaky due to concerns over potential government intervention in commodity exports.

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Market Positioning, Risks, and Triggers for Reversal

Despite the strong upward trend in USD/IDR, we believe the risk-reward is shifting. The pair is now trading in deeply overbought territory, with technical indicators like the Relative Strength Index (RSI) well above 70. On a real effective exchange rate basis, the Rupiah appears very cheap, nearing levels of undervaluation last seen during the 2013 Taper Tantrum.

Given this stretched positioning, we feel it is imprudent to chase the USD/IDR rally higher. Instead, we see value in using options to position for a potential sharp reversal. Buying cheap, out-of-the-money puts on USD/IDR provides a low-cost way to gain downside exposure if a catalyst emerges.

We will be watching for specific triggers that could spark this reversal. A de-escalation of geopolitical tensions, such as those between the U.S. and Iran, could cause a sharp drop in oil prices and benefit the Rupiah. Similarly, any sign of softening U.S. economic data could lower Fed rate expectations and weaken the dollar, prompting a rapid pullback in USD/IDR.