| Date | Bid | Offer |
|---|---|---|
| May 31 2021 | R$ 4.3344 | R$ 4.3352 |
| May 28 2021 | R$ 4.3237 | R$ 4.3257 |
| May 27 2021 | R$ 4.3743 | R$ 4.3763 |
| May 26 2021 | R$ 4.3881 | R$ 4.3901 |
| May 25 2021 | R$ 4.4028 | R$ 4.4047 |
| May 24 2021 | R$ 4.4015 | R$ 4.4034 |
| May 21 2021 | R$ 4.3913 | R$ 4.3933 |
| May 20 2021 | R$ 4.3896 | R$ 4.3905 |
| May 19 2021 | R$ 4.3682 | R$ 4.3691 |
| May 18 2021 | R$ 4.3589 | R$ 4.3609 |
| May 17 2021 | R$ 4.3688 | R$ 4.3697 |
| May 14 2021 | R$ 4.3496 | R$ 4.3515 |
| May 13 2021 | R$ 4.3468 | R$ 4.3487 |
| May 12 2021 | R$ 4.3237 | R$ 4.3256 |
| May 11 2021 | R$ 4.3321 | R$ 4.3341 |
| May 10 2021 | R$ 4.3201 | R$ 4.3220 |
| May 07 2021 | R$ 4.3018 | R$ 4.3037 |
| May 06 2021 | R$ 4.3371 | R$ 4.3387 |
| May 05 2021 | R$ 4.3929 | R$ 4.3948 |
| May 04 2021 | R$ 4.4225 | R$ 4.4245 |
| May 03 2021 | R$ 4.4054 | R$ 4.4063 |
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.