| Date | Bid | Offer |
|---|---|---|
| Apr 28 2017 | R$ 3.1978 | R$ 3.1984 |
| Apr 27 2017 | R$ 3.1757 | R$ 3.1763 |
| Apr 26 2017 | R$ 3.1841 | R$ 3.1847 |
| Apr 25 2017 | R$ 3.1571 | R$ 3.1577 |
| Apr 24 2017 | R$ 3.1245 | R$ 3.1251 |
| Apr 20 2017 | R$ 3.1447 | R$ 3.1453 |
| Apr 19 2017 | R$ 3.1288 | R$ 3.1294 |
| Apr 18 2017 | R$ 3.0952 | R$ 3.0958 |
| Apr 17 2017 | R$ 3.1030 | R$ 3.1036 |
| Apr 13 2017 | R$ 3.1263 | R$ 3.1269 |
| Apr 12 2017 | R$ 3.1457 | R$ 3.1463 |
| Apr 11 2017 | R$ 3.1418 | R$ 3.1424 |
| Apr 10 2017 | R$ 3.1403 | R$ 3.1409 |
| Apr 07 2017 | R$ 3.1296 | R$ 3.1302 |
| Apr 06 2017 | R$ 3.1154 | R$ 3.1160 |
| Apr 05 2017 | R$ 3.0917 | R$ 3.0923 |
| Apr 04 2017 | R$ 3.1225 | R$ 3.1231 |
| Apr 03 2017 | R$ 3.1161 | R$ 3.1167 |
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.