Bank Indonesia has taken further steps to manage foreign exchange volatility and support the Indonesian rupiah. Measures include tighter controls on US dollar purchases, ongoing bond buying, and allowing selected dealers to access offshore non-deliverable forwards (NDFs).
As part of a seven-step agenda, the central bank reduced the monthly cap for foreign currency purchases without supporting documents to $25k, from $50k. This followed similar action taken last month.
The changes aim to limit demand for US dollars where there is no clear underlying payment need. Authorities are also focusing on ensuring purchases are linked to documented requirements.
Bank Indonesia plans to continue bond purchases in coordination with the Ministry of Finance, with IDR 123trn bought year to date. Selected dealers have also been enabled to use offshore NDFs as part of the policy mix.
The article notes that the likelihood of further foreign exchange restrictions may decrease if a US–Iran ceasefire helps stabilise regional currencies. It also states the content was produced using an AI tool and reviewed by an editor.
With Bank Indonesia taking a firm stance, we see reduced upside for the USD/IDR pair in the near term. The central bank’s actions have already helped the Rupiah pull back from its recent high of 16,750 to around 16,480 in the past week. Traders should therefore be cautious about maintaining large, speculative long dollar positions against the Rupiah, as intervention risk is high.
These measures are actively suppressing currency fluctuations, which suggests a strategy of selling volatility. We have seen the one-month implied volatility on USD/IDR options drop from over 9% to nearly 7.5% since these policies were reinforced. This environment may be favorable for short-straddle or short-strangle option strategies, assuming the central bank can maintain currency stability.
The attractive yields on Bank Indonesia’s securities (SRBI) are making the Rupiah carry trade more appealing. This is evidenced by the net foreign inflow of approximately $500 million into government securities last week, a sharp reversal from the outflows we saw in April 2026. This is a more aggressive support package than the one we observed during the emerging market jitters in the third quarter of 2025, when the central bank relied more heavily on verbal intervention.
Looking ahead, the key external factor remains the geopolitical situation between the US and Iran. Current peace talks are showing tentative progress, which if successful, would likely provide a significant tailwind for the Rupiah and other regional currencies. This would diminish the need for further capital controls from Bank Indonesia.
