| Date | Bid | Offer |
|---|---|---|
| May 30 2014 | R$ 3.7522 | R$ 3.7535 |
| May 29 2014 | R$ 3.7183 | R$ 3.7201 |
| May 28 2014 | R$ 3.7420 | R$ 3.7434 |
| May 27 2014 | R$ 3.7540 | R$ 3.7555 |
| May 26 2014 | R$ 3.7394 | R$ 3.7416 |
| May 23 2014 | R$ 3.7308 | R$ 3.7323 |
| May 22 2014 | R$ 3.7296 | R$ 3.7311 |
| May 21 2014 | R$ 3.7296 | R$ 3.7308 |
| May 20 2014 | R$ 3.7314 | R$ 3.7328 |
| May 19 2014 | R$ 3.7181 | R$ 3.7202 |
| May 16 2014 | R$ 3.7190 | R$ 3.7209 |
| May 15 2014 | R$ 3.7202 | R$ 3.7223 |
| May 14 2014 | R$ 3.7127 | R$ 3.7141 |
| May 13 2014 | R$ 3.7201 | R$ 3.7216 |
| May 12 2014 | R$ 3.7376 | R$ 3.7395 |
| May 09 2014 | R$ 3.7377 | R$ 3.7391 |
| May 08 2014 | R$ 3.7448 | R$ 3.7463 |
| May 07 2014 | R$ 3.7787 | R$ 3.7801 |
| May 06 2014 | R$ 3.7879 | R$ 3.7896 |
| May 05 2014 | R$ 3.7582 | R$ 3.7599 |
| May 02 2014 | R$ 3.7466 | R$ 3.7478 |
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.