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Jakarta Post

Indonesia’s economy is starting to lose the confidence game

Faced with a plummeting rupiah and shifting global markets, Indonesia must halt its erratic policymaking and institutional erosion before it permanently loses the vital game of investor confidence.

Winarno Zain (The Jakarta Post)
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Jakarta
Mon, July 20, 2026 Published on Jul. 18, 2026 Published on 2026-07-18T12:00:28+07:00

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The Bank Indonesia logo adorns the gate of the central bank's headquarters in Jakarta in this undated photograph. The Bank Indonesia logo adorns the gate of the central bank's headquarters in Jakarta in this undated photograph. (Antara/File)

B

ank Indonesia (BI) has aggressively increased its benchmark interest rate recently to contain the fall of the rupiah, which has been under severe pressure since conflict broke out in the Middle East. Within a single month, BI raised its rate by 100 basis points to 5.75 percent.

However, the currency has continued its downward trajectory against the United States dollar. When BI initiated this tightening cycle on May 20, the rupiah stood at 17,685 per dollar; it has since breached and hovered above the psychological threshold of 18,000 per dollar.

This exceptionally sharp slide over the past two months points to something far more severe than typical market volatility: an extreme overshooting phenomenon. The currency’s collapse no longer reflects underlying purchasing power fundamentals, but rather a market disequilibrium driven by panic, massive capital flight and an acute shortage of dollar liquidity in the domestic spot market.

Investor expectations play a pivotal role in dictating exchange rates. If market participants believe the rupiah will continue to weaken, they will preemptively sell the currency to buy dollars, creating a self-reinforcing downward spiral. Under such circumstances, even a large interest rate hike by the central bank cannot arrest the depreciation.

As a tool for currency stabilization, monetary tightening has distinct structural limits. While higher rates can theoretically attract capital, they also choke off domestic economic growth, which is precisely why BI cannot raise rates indefinitely.

Looking back at the 1997–1998 Asian Financial Crisis sheds light on the delicate relationship between BI’s policy rates and the rupiah. During that crisis, the currency collapsed from approximately Rp 2,400 per US dollar in mid-1997 to nearly Rp 17,000 in January 1998. BI raised rates repeatedly; by early 1998, its benchmark rate exceeded 40 percent, while overnight interbank rates skyrocketed to 100 percent.

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Compared with pre-crisis levels, effective short-term interest rates surged by roughly 60 percentage points. This painful monetary tightening caused the economy to contract by 13.1 percent in 1998, resulting in one of the deepest recessions in the nation's history.

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