| Date | Bid | Offer |
|---|---|---|
| May 29 2015 | R$ 3.1781 | R$ 3.1788 |
| May 28 2015 | R$ 3.1741 | R$ 3.1748 |
| May 27 2015 | R$ 3.1734 | R$ 3.1740 |
| May 26 2015 | R$ 3.1345 | R$ 3.1351 |
| May 25 2015 | R$ 3.1206 | R$ 3.1212 |
| May 22 2015 | R$ 3.0647 | R$ 3.0653 |
| May 21 2015 | R$ 3.0289 | R$ 3.0295 |
| May 20 2015 | R$ 3.0340 | R$ 3.0347 |
| May 19 2015 | R$ 3.0278 | R$ 3.0284 |
| May 18 2015 | R$ 3.0139 | R$ 3.0145 |
| May 15 2015 | R$ 2.9887 | R$ 2.9894 |
| May 14 2015 | R$ 3.0026 | R$ 3.0032 |
| May 13 2015 | R$ 3.0096 | R$ 3.0103 |
| May 12 2015 | R$ 3.0382 | R$ 3.0389 |
| May 11 2015 | R$ 3.0169 | R$ 3.0175 |
| May 08 2015 | R$ 2.9959 | R$ 2.9966 |
| May 07 2015 | R$ 3.0415 | R$ 3.0421 |
| May 06 2015 | R$ 3.0414 | R$ 3.0420 |
| May 05 2015 | R$ 3.0619 | R$ 3.0626 |
| May 04 2015 | R$ 3.0748 | R$ 3.0754 |
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.