Jakarta. Indonesia's government bond auction is expected to attract solid investor demand as higher sovereign yields, improving domestic sentiment, and a firmer rupiah enhance the appeal of government securities despite the government's sizable fundraising target.

The government has set an indicative target of Rp 32 trillion ($1.77 billion) for this week's auction on Tuesday, with the flexibility to raise up to 150% of that amount as part of its front-loading strategy to meet the 2026 state budget (APBN) financing needs. The auction will offer nine series of Treasury bills (SPN) and government bonds (SUN), featuring fixed coupon rates ranging from 5.875% to 7.125% and maturities stretching from August 2026 to July 2064.

Center of Reform on Economics (CORE) Indonesia economist Yusuf Rendy Manilet said investor appetite will be supported by increasingly attractive bond yields, but sustained demand -- particularly from foreign investors -- will ultimately depend on rupiah stability and confidence in the government's fiscal credibility.

"Higher yields are certainly attractive. However, for foreign investors, that alone is not enough if the rupiah continues to weaken, as currency depreciation could erode investment returns," Yusuf said.

The benchmark 10-year SUN yield has climbed roughly 33 basis points over the past month from a low of around 6.823%, reflecting capital outflows, persistent pressure on the rupiah, and stronger-than-expected US economic data. Even so, Indonesian sovereign bonds continue to offer a significant yield premium over safer assets such as the US 10-year Treasury, which currently yields around 4.48%.

Meanwhile, the rupiah has fallen 7.85% against the USD  year-to-date, according to MarketWatch data. Over the past month, however, the currency has strengthened 0.82% against the greenback, offering some relief after months of pressure.

Yusuf said investors are also monitoring whether the government can maintain fiscal discipline as financing requirements for the 2026 state budget increase. Maintaining a credible and sustainable deficit management strategy, he said, will be critical to preserving investor confidence.

Global bond markets, meanwhile, remain influenced by expectations surrounding the Federal Reserve's interest rate path and lingering geopolitical uncertainty, factors that continue to make investors more selective toward emerging-market assets.

Still, Yusuf said the recent rise in Indonesian bond yields has begun to lure foreign capital back into domestic financial markets.

"Foreign capital has started returning to domestic financial instruments following Bank Indonesia's interest rate adjustment. However, most of the inflows have gone into SRBI because it offers competitive returns with lower risk," he said.

He added that maintaining rupiah stability remains essential to attracting larger foreign inflows into the government bond market. Indonesia also needs to preserve a competitive real yield advantage over peer economies.

Yusuf expects investors to favor short- and medium-term bonds, as elevated interest rates and an inverted yield curve continue to discourage exposure to long-duration debt.

"Short-tenor bonds help reduce duration risk, while medium-tenor bonds remain attractive because they offer a balanced combination of yield potential and investment risk," he said.

By contrast, very long-dated bonds are likely to remain less attractive, as investors continue to demand higher risk premiums amid uncertainty over the global interest rate outlook.

Yusuf said the government's relatively large indicative auction target reflects its front-loading financing strategy, allowing it to secure funding while market conditions improve and investor appetite for government securities strengthens.

Even so, he emphasized that the issuance target remains flexible. "The government still has room to adjust the amount absorbed according to market conditions. So even though the indicative target is large, the final issuance will depend on investor demand and the level of funding costs considered optimal," Yusuf said.