Indonesian Rupiah weakens after mixed economic figures

  • Export growth of 11.87% year-on-year, up on the previous month, helped lift Indonesia’s September trade surplus to $3.36 billion.
  • At 3.23% in October, domestic inflation edged lower and stayed within Bank Indonesia’s target range.
  • A 75% probability of a Fed rate rise underpins the dollar, although easing Middle East tensions have capped its gains.

Indonesia’s September trade surplus reached USD 3.36 billion, well above market expectations of USD 1.9 billion, while export growth accelerated to 11.87% year-on-year from 6.72% in August, comfortably exceeding forecasts of 6.45%. Despite these strong headline trade figures, the Indonesian Rupiah (IDR) remained subdued following a mixed set of domestic economic releases. Against that backdrop, USD/IDR recovered after two days of declines, trading at around 18,180 during Monday’s Asian session.

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September imports rose 18.41% year-on-year, below the expected 20.83% increase and the slowest pace since March. Diverging energy trends contributed to the slowdown: higher purchases of refined oil products drove a 23.94% year-on-year rise in oil and gas imports, whereas crude oil imports fell by 7.00%. October’s annual domestic inflation rate, meanwhile, eased to 3.23% from September’s three-month high of 3.28%. The reading undershot market expectations of 3.29% and left inflation comfortably inside Bank Indonesia’s 1.5% to 3.5% target range.

Although the Rupiah remains weak, further gains in USD/IDR could be constrained by a declining US Dollar (USD) as demand for safe havens eases. Qatari and Iranian officials held talks for a third consecutive day, seeking to resolve the Middle East conflict before the US midterm elections. The discussions reduced geopolitical tensions, counterbalancing persistent concerns about renewed US military action against Iran.

Rising expectations of a Federal Reserve interest rate increase nevertheless leave scope for the US Dollar to recover. The CME FedWatch Tool shows traders assigning approximately a 75% probability to a December rate rise, supported by recent resilient US macroeconomic readings and continuing inflationary pressures.

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Indonesian Rupiah: frequently asked questions

Global market conditions, domestic economic fundamentals, movements in commodity prices and proactive central bank intervention all influence the Indonesian Rupiah (IDR). Both the resilience of the domestic economy and the pace of international economic activity are particularly important to the direction of this emerging market currency.

Through its monetary policy strategy and direct market operations, Bank Indonesia (BI) has a pivotal role in stabilising the Rupiah. Adjustments to benchmark interest rates allow the central bank to manage yield differentials relative to major global central banks, including the US Federal Reserve, helping to attract and retain foreign portfolio investment. To moderate currency volatility, BI also operates a "triple-intervention" framework across the spot, derivative (DNDF) and government bond markets. Monetary instruments such as Sekuritas Rupiah Bank Indonesia (SRBI) complement these measures by supporting capital inflows.

Domestic inflation, trade performance and the overall health of public finances determine the IDR’s underlying strength from a macroeconomic standpoint. These fundamentals are closely linked to Indonesia’s trade and current account balances. At the global level, changes in liquidity and international investors’ appetite for risk also directly influence exchange rate movements.

Higher global commodity prices benefit Indonesia as a major exporter of palm oil, coal, nickel and natural gas. By generating trade surpluses and increasing foreign currency inflows, they strengthen the Rupiah. Indonesia is also a net importer of crude oil, however. Higher global oil prices therefore raise its foreign exchange burden, widening the current account deficit and putting downward pressure on the currency.