Bank Indonesia’s November 2 posted US-dollar transaction rates were Rp18,047.31 on the central bank’s buying side and Rp18,228.69 on its selling side. Their arithmetic midpoint is Rp18,138.00, exactly the Jakarta Interbank Spot Dollar Rate (JISDOR) shown for October 30. The equality is not a mysterious market coincidence: Bank Indonesia explicitly states that the midpoint of its published USD/IDR transaction rates uses the JISDOR reference. The posted Monday quote therefore should not be confused with a new Monday interbank spot observation.[1][2][3]
The stated buy and sell rates differ by Rp181.38 per dollar, or exactly 1.00% of their Rp18,138.00 midpoint. This is the bank’s quoted transaction-rate interval for the specified date, rather than the bid–ask spread at which every commercial bank or interbank counterpart could trade. Neither the unchanged reference midpoint nor the posted spread demonstrates that spot USD/IDR itself traded without movement on Monday.[1][3]
Two Bank Indonesia rate products, two observation windows
| Measure | Rupiah per US$ | Status |
|---|---|---|
| BI transaction quote — buy | 18,047.31 | 2 Nov postingSource 1 |
| BI transaction quote — sell | 18,228.69 | 2 Nov postingSource 1 |
| Arithmetic midpoint | 18,138.00 | Computed from BI 2 Nov quotesSource 1 |
| JISDOR spot benchmark | 18,138.00 | 30 Oct observationSource 2 |
The reference is carried into the transaction-rate calculation
Bank Indonesia’s methodology distinguishes JISDOR, the reference calculated from domestic interbank USD/IDR spot transactions, from its daily buy-and-sell transaction board. Its public transaction-rate page states that the USD/IDR midpoint uses JISDOR. The JISDOR reference is collected over a defined Jakarta market window and published after that collection period; a transaction-rate posting before the next completed spot reference may therefore use the most recent available fixing. The document itself, not an inference from identical digits, establishes the methodology.[3][2]
When the two published datasets were checked on November 2, the historical JISDOR table still showed October 30 at Rp18,138.00 as its latest completed entry. The transaction board, meanwhile, was dated November 2. Readers comparing the two need to preserve those separate observation dates: a transaction board calculated using a prior benchmark is not a new benchmark and is not an executable interbank closing price.[1][2][3]
For users of the official quotations, the practical information is the quoted bank-side bid and offer and the published construction of their midpoint. A genuinely fresh Monday JISDOR reference would supply a separate observation of interbank trading once released; it should not be backfilled from the older figure simply because the two rate products share the same reference input.[1][2][3]
Sources & further reading
- Foreign exchange transaction rates — 2 November 2026 Bank Indonesia · Accessed 2 Nov 2026
- Jakarta Interbank Spot Dollar Rate — 30 October 2026 historical observation Bank Indonesia · Accessed 2 Nov 2026
- JISDOR, non-USD/IDR reference and transaction-rate methodology Bank Indonesia · Accessed 2 Nov 2026