| Date | Bid | Offer |
|---|---|---|
| May 31 2016 | R$ 4.0018 | R$ 4.0039 |
| May 30 2016 | R$ 4.0083 | R$ 4.0093 |
| May 27 2016 | R$ 4.0281 | R$ 4.0295 |
| May 25 2016 | R$ 3.9922 | R$ 3.9943 |
| May 24 2016 | R$ 3.9541 | R$ 3.9551 |
| May 23 2016 | R$ 3.9897 | R$ 3.9914 |
| May 20 2016 | R$ 3.9680 | R$ 3.9701 |
| May 19 2016 | R$ 4.0363 | R$ 4.0374 |
| May 18 2016 | R$ 3.9867 | R$ 3.9888 |
| May 17 2016 | R$ 3.9711 | R$ 3.9725 |
| May 16 2016 | R$ 3.9674 | R$ 3.9688 |
| May 13 2016 | R$ 3.9565 | R$ 3.9575 |
| May 12 2016 | R$ 3.9676 | R$ 3.9697 |
| May 11 2016 | R$ 3.9634 | R$ 3.9655 |
| May 10 2016 | R$ 3.9578 | R$ 3.9595 |
| May 09 2016 | R$ 4.0337 | R$ 4.0352 |
| May 06 2016 | R$ 4.0369 | R$ 4.0390 |
| May 05 2016 | R$ 4.0238 | R$ 4.0255 |
| May 04 2016 | R$ 4.0647 | R$ 4.0661 |
| May 03 2016 | R$ 4.0893 | R$ 4.0914 |
| May 02 2016 | R$ 4.0285 | R$ 4.0299 |
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.