Rupiah Weakens to Rp18,033 After BI Holds Rate, Cuts Reserve Ratio

The Indonesian rupiah opened 11 points, or 0.06 percent, weaker at Rp18,033 per US dollar on Thursday, October 22, 2026, compared to the previous close of Rp18,022. The decline came right after Bank Indonesia announced the results of its board meeting, which kept the benchmark interest rate unchanged.

Rully Nova, an analyst at Bank Woori Saudara, said the rupiah's weakness today stemmed from that domestic decision. "The rupiah is expected to weaken today due to domestic factors following BI's board meeting decision to hold the benchmark rate steady at 5.75 percent," he told ANTARA in Jakarta.

What BI Decided

BI's benchmark rate stayed at 5.75 percent this round. But behind that headline number, two technical adjustments also shaped market liquidity.

First, the deposit facility rate, the rate banks earn for parking funds at BI, rose by 25 basis points to 5 percent. Second, the lending facility rate, which banks pay to borrow from BI, held steady at 6.5 percent. Together, this narrows the spread between the two instruments, which typically makes banks more comfortable parking short-term funds at the central bank rather than lending them out.

Another notable change came in the reserve requirement ratio (GWM), the share of third-party deposits banks must hold at BI rather than lend out. BI lowered the average GWM by 2 percentage points to strengthen rupiah liquidity in the banking system.

Specifically, the GWM for conventional commercial banks dropped from 9 percent to 7 percent. For Islamic commercial banks and Islamic business units, it fell from 7.5 percent to 5.5 percent. That means more bank funds are freed up for lending or other instruments, even though the policy rate itself didn't move.

MSCI-Related Outflow Risk

BI said it continues to monitor risks in the domestic stock market, including potential foreign capital outflows, following MSCI's announcement of a proposed reclassification of Indonesia's capital market. Index reclassifications by global providers like MSCI typically influence allocation decisions by large asset managers, since many passive funds track index composition closely.

If Indonesia's classification shifts unfavorably, some foreign funds could exit domestic stocks and bonds. That risk is part of why BI is staying extra cautious even as it holds rates steady.

Global Backdrop: US Treasury Yields Fall

Separately, Rully sees room for Indonesian government bonds to strengthen as demand for US Treasuries rises. US bond yields fell to 5.1 percent. Falling yields signal rising bond prices, usually a sign investors are seeking safety or pricing in expectations of Fed rate cuts.

If that trend continues, demand for Indonesian government securities could get a boost too, since global investors often compare yields across countries before allocating funds.

Factoring in both domestic and global dynamics, Rully projects the rupiah trading between Rp18,000 and Rp18,120 per US dollar today.

Ripple Effects Across Markets

BI's decision could ripple into other asset classes, though the direction still depends on how things unfold.

In the stock market, the combination of a steady rate and MSCI-related outflow risk could make foreign investors more cautious in the near term, particularly for stocks with heavy weighting in global indices. On the other hand, the lower reserve requirement, which frees up bank liquidity, could give lenders more room to extend credit, indirectly supporting sentiment in the banking sector.

For crypto markets, a weaker rupiah and uncertain domestic rate direction usually don't have a direct impact, since crypto prices tend to track global sentiment and the US dollar more closely. Still, if falling US Treasury yields continue pushing global risk assets higher, that could become an additional tailwind for crypto demand, though the link remains uncertain.

For domestic bonds, improving demand for US Treasuries could spill over into Indonesian government bonds, as Rully suggests. But this remains a possibility rather than a certainty, since the direction of Indonesia's bond market will also hinge on BI's future rate decisions and how the MSCI situation develops.

What It Means for Traders

A few things worth tracking from this decision.

• Rupiah levels: the projected range of Rp18,000 to Rp18,120 per dollar serves as a near-term reference, with Rp18,033 as today's opening point.
• MSCI developments: further announcements on Indonesia's capital market classification could trigger additional volatility in stocks and the rupiah, especially once there's more clarity on the direction.
• US Treasury yields: movement around the 5.1 percent level can serve as a gauge for global risk-on or risk-off sentiment, which in turn affects capital flows into emerging markets like Indonesia.
• Banking liquidity: the impact of the lower reserve requirement on credit growth and deposit rates will likely take several weeks to show up, not immediately.
• BI's next policy meeting: the direction of the benchmark rate going forward will be the key driver of the rupiah's medium-term trend.