| Date | Bid | Offer |
|---|---|---|
| Jul 31 2020 | R$ 3.8864 | R$ 3.8880 |
| Jul 30 2020 | R$ 3.8556 | R$ 3.8572 |
| Jul 29 2020 | R$ 3.8433 | R$ 3.8441 |
| Jul 28 2020 | R$ 3.8728 | R$ 3.8747 |
| Jul 27 2020 | R$ 3.8759 | R$ 3.8775 |
| Jul 24 2020 | R$ 3.8829 | R$ 3.8845 |
| Jul 23 2020 | R$ 3.8625 | R$ 3.8641 |
| Jul 22 2020 | R$ 3.8110 | R$ 3.8125 |
| Jul 21 2020 | R$ 3.8882 | R$ 3.8889 |
| Jul 20 2020 | R$ 3.9631 | R$ 3.9639 |
| Jul 17 2020 | R$ 3.9419 | R$ 3.9427 |
| Jul 16 2020 | R$ 3.9547 | R$ 3.9563 |
| Jul 15 2020 | R$ 3.9557 | R$ 3.9573 |
| Jul 14 2020 | R$ 3.9893 | R$ 3.9900 |
| Jul 13 2020 | R$ 3.9413 | R$ 3.9429 |
| Jul 10 2020 | R$ 3.9310 | R$ 3.9317 |
| Jul 09 2020 | R$ 3.9007 | R$ 3.9023 |
| Jul 08 2020 | R$ 3.9492 | R$ 3.9508 |
| Jul 07 2020 | R$ 3.9229 | R$ 3.9245 |
| Jul 06 2020 | R$ 3.9184 | R$ 3.9200 |
| Jul 03 2020 | R$ 3.9348 | R$ 3.9364 |
| Jul 02 2020 | R$ 3.9010 | R$ 3.9017 |
| Jul 01 2020 | R$ 3.9501 | R$ 3.9516 |
Source: Brazilian Central Bank
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Ptax is the main reference rate for the US Dollar in Brazil. It's published daily by the Brazilian Central Bank based on the quotes received from the major foreign exchange dealers in the Brazilian market. It's released by 1 PM (GMT-3) every business day.