How BNA Reference Rates Are Set
The Banco Nacional de Angola (BNA) publishes daily reference exchange rates that serve as the benchmark for all kwanza-denominated transactions in the formal economy. The USD/AOA reference rate—currently 914.60—is the most widely watched figure, anchoring cross rates for all other currency pairs and serving as the baseline for commercial bank FX pricing.
Publication Schedule
The BNA publishes reference rates on each business day, typically by mid-morning Luanda time (WAT, UTC+1). Rates are posted on the BNA’s official website and disseminated to authorized banks and financial data providers.
| Detail | Value |
|---|---|
| Publication time | Mid-morning WAT (typically by 10:00–11:00) |
| Frequency | Daily (business days) |
| Primary rate | USD/AOA |
| Cross rates published | EUR/AOA, GBP/AOA, ZAR/AOA, and others |
| Data source | BNA FX auction outcomes and interbank activity |
Rate Determination Methodology
The BNA reference rate is derived from a combination of inputs:
- FX auction results. The weighted-average rate from the most recent BNA FX auction is the primary input. Because auctions use discriminatory (pay-as-bid) pricing, the weighted average reflects the volume-adjusted clearing level of the market.
- Interbank market transactions. Rates at which authorized banks trade FX among themselves in the interbank market provide additional data points.
- BNA discretion. Under the managed float regime, the BNA retains the ability to smooth short-term volatility by adjusting the reference rate’s trajectory, even if individual auction outcomes suggest a larger move.
Official Rate vs. Parallel Market Rate
Angola maintains both an official exchange rate (the BNA reference) and an informal parallel market rate. The gap between these two rates is one of the most important indicators of FX market health:
| Scenario | Spread (Parallel Premium) | What It Signals |
|---|---|---|
| Well-supplied market | 2–5% | Adequate FX liquidity; auctions meeting demand |
| Moderate stress | 5–15% | Partial unmet demand; some FX rationing |
| Severe stress | 15–40%+ | Significant FX shortage; widespread parallel market activity |
Historically, the parallel premium spiked to over 100% during the worst of the oil price crisis (2015–2017) when the kwanza was still pegged. Since the 2019 float, the spread has generally narrowed as the official rate has been allowed to adjust closer to market-clearing levels. The spread tracker monitors this gap in real time.
Cross Rate Derivation
Cross rates for non-dollar currencies are derived from the USD/AOA reference rate combined with international FX market rates:
| Pair | Derivation | Indicative Rate |
|---|---|---|
| EUR/AOA | USD/AOA x EUR/USD | ~960–980 |
| GBP/AOA | USD/AOA x GBP/USD | ~1,150–1,170 |
| BRL/AOA | USD/AOA / USD/BRL | ~155–165 |
| ZAR/AOA | USD/AOA / USD/ZAR | ~48–52 |
| CNY/AOA | USD/AOA / USD/CNY | ~125–130 |
| JPY/AOA | USD/AOA / USD/JPY | ~6.0–6.2 |
| CHF/AOA | USD/AOA x CHF/USD | ~1,020–1,040 |
Using BNA Rates
The BNA reference rate is used for:
- Commercial bank FX transactions. Banks price client trades as a spread around the reference rate (see FX banks).
- Tax and customs valuation. Import duties and tax obligations denominated in foreign currency are converted at the official rate.
- Financial reporting. Companies operating in Angola use the BNA rate for translating foreign-currency-denominated assets and liabilities.
- Remittance benchmarking. Senders can compare provider rates against the BNA reference to assess FX markups (see remittance corridors).
For the current rate and historical trends, see USD/AOA and kwanza depreciation analysis.