| Date | Bid | Offer |
|---|---|---|
| May 31 2019 | R$ 3.9260 | R$ 3.9281 |
| May 30 2019 | R$ 3.9418 | R$ 3.9432 |
| May 29 2019 | R$ 3.9685 | R$ 3.9703 |
| May 28 2019 | R$ 3.9914 | R$ 3.9936 |
| May 27 2019 | R$ 4.0036 | R$ 4.0046 |
| May 24 2019 | R$ 4.0219 | R$ 4.0242 |
| May 23 2019 | R$ 4.0334 | R$ 4.0356 |
| May 22 2019 | R$ 3.9863 | R$ 3.9873 |
| May 21 2019 | R$ 4.0380 | R$ 4.0406 |
| May 20 2019 | R$ 4.0704 | R$ 4.0726 |
| May 17 2019 | R$ 4.0402 | R$ 4.0412 |
| May 16 2019 | R$ 3.9727 | R$ 3.9737 |
| May 15 2019 | R$ 3.9656 | R$ 3.9678 |
| May 14 2019 | R$ 3.9423 | R$ 3.9445 |
| May 13 2019 | R$ 3.9619 | R$ 3.9640 |
| May 10 2019 | R$ 3.9134 | R$ 3.9155 |
| May 09 2019 | R$ 3.9142 | R$ 3.9156 |
| May 08 2019 | R$ 3.8635 | R$ 3.8645 |
| May 07 2019 | R$ 3.9031 | R$ 3.9041 |
| May 06 2019 | R$ 3.8917 | R$ 3.8927 |
| May 03 2019 | R$ 3.8686 | R$ 3.8703 |
| May 02 2019 | R$ 3.8932 | R$ 3.8953 |
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.