| Date | Bid | Offer |
|---|---|---|
| Jun 30 2017 | R$ 3.7736 | R$ 3.7750 |
| Jun 29 2017 | R$ 3.7618 | R$ 3.7631 |
| Jun 28 2017 | R$ 3.7525 | R$ 3.7539 |
| Jun 27 2017 | R$ 3.7560 | R$ 3.7574 |
| Jun 26 2017 | R$ 3.7077 | R$ 3.7097 |
| Jun 23 2017 | R$ 3.7316 | R$ 3.7336 |
| Jun 22 2017 | R$ 3.7179 | R$ 3.7189 |
| Jun 21 2017 | R$ 3.7034 | R$ 3.7054 |
| Jun 20 2017 | R$ 3.6861 | R$ 3.6874 |
| Jun 19 2017 | R$ 3.6790 | R$ 3.6800 |
| Jun 16 2017 | R$ 3.6803 | R$ 3.6819 |
| Jun 14 2017 | R$ 3.7019 | R$ 3.7029 |
| Jun 13 2017 | R$ 3.7160 | R$ 3.7173 |
| Jun 12 2017 | R$ 3.6947 | R$ 3.6958 |
| Jun 09 2017 | R$ 3.6626 | R$ 3.6636 |
| Jun 08 2017 | R$ 3.6821 | R$ 3.6841 |
| Jun 07 2017 | R$ 3.6788 | R$ 3.6801 |
| Jun 06 2017 | R$ 3.6962 | R$ 3.6972 |
| Jun 05 2017 | R$ 3.6912 | R$ 3.6923 |
| Jun 02 2017 | R$ 3.6506 | R$ 3.6522 |
| Jun 01 2017 | R$ 3.6216 | R$ 3.6236 |
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.