Indonesian Rupiah exchange rate fluctuations

The Indonesian Rupiah showed a strengthening trend against the US Dollar in early September 2026.

On September 4, the currency appreciated to Rp17,642 per USD, driven by dovish signals from Federal Reserve Governor Christopher Waller regarding disinflation. By September 9, the Rupiah continued to gain, closing at Rp17,511 per USD, supported by strong domestic economic indicators including a surge in the Consumer Confidence Index.

However, the Rupiah weakened on September 10, trading in the range of Rp17,540 to Rp17,595. This volatility is driven by a ‘wait and see’ approach from market participants awaiting US Producer Price Index (PPI) and Consumer Price Index (CPI) data, which are critical for assessing future Federal Reserve interest rate decisions. External pressures, including rising 10-year US Treasury yields and a strengthening US Dollar Index, have further increased the appeal of dollar-based assets.

Domestically, rising global crude oil prices—driven by geopolitical tensions in the Middle East—are posing risks to Indonesia’s fiscal stability. While the government maintains that the state budget remains secure, high oil prices increase the necessary allocations for energy subsidies and compensation for fuel and LPG. This has heightened concerns regarding potential budget deficits and inflationary pressures should domestic fuel prices require adjustment.