Currency and rates · Edition 4
USD/TZS changed 7.5% YoY to 12 Sep 2026; the 364-day bill yielded 6.47% (9 Sep 2026)
Official USD/TZS rose 7.48% over the exact year to 2026-09-12, while the recorded 364-day bill auction yielded 6.47% on 2026-09-09. These are two independently dated observations, not a realized return comparison.
The comparison places the exact-year change in the official BoT indicative USD/TZS mean beside the annualized weighted-average yield from the latest 364-day bill auction. It does not align holding periods or include reinvestment, tax, costs, price changes or execution rates.
The numbers
| Measure | Date / period | Value (%) |
|---|---|---|
| USD/TZS change, YoY | 12 Sep 2026 | 7.48 |
| 364-day bill | 9 Sep 2026 | 6.47 |
What changed
Official USD/TZS rose 7.48% over the exact year to 2026-09-12, while the recorded 364-day bill auction yielded 6.47% on 2026-09-09. These are two independently dated observations, not a realized return comparison.
Why it matters
The 1.01pp gap compares a change in the dollar quotation with an auction yield; it does not measure an investor's return.
Method and limits
The comparison places the exact-year change in the official BoT indicative USD/TZS mean beside the annualized weighted-average yield from the latest 364-day bill auction. It does not align holding periods or include reinvestment, tax, costs, price changes or execution rates.
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