| Date | Bid | Offer |
|---|---|---|
| Apr 30 2015 | R$ 4.5865 | R$ 4.5889 |
| Apr 29 2015 | R$ 4.5472 | R$ 4.5484 |
| Apr 28 2015 | R$ 4.4346 | R$ 4.4361 |
| Apr 27 2015 | R$ 4.4527 | R$ 4.4553 |
| Apr 24 2015 | R$ 4.5117 | R$ 4.5141 |
| Apr 23 2015 | R$ 4.5248 | R$ 4.5261 |
| Apr 22 2015 | R$ 4.5339 | R$ 4.5364 |
| Apr 20 2015 | R$ 4.5432 | R$ 4.5447 |
| Apr 17 2015 | R$ 4.5627 | R$ 4.5639 |
| Apr 16 2015 | R$ 4.5120 | R$ 4.5141 |
| Apr 15 2015 | R$ 4.5335 | R$ 4.5356 |
| Apr 14 2015 | R$ 4.5650 | R$ 4.5672 |
| Apr 13 2015 | R$ 4.5438 | R$ 4.5462 |
| Apr 10 2015 | R$ 4.5097 | R$ 4.5119 |
| Apr 09 2015 | R$ 4.4887 | R$ 4.4910 |
| Apr 08 2015 | R$ 4.5995 | R$ 4.6023 |
| Apr 07 2015 | R$ 4.6385 | R$ 4.6400 |
| Apr 06 2015 | R$ 4.6241 | R$ 4.6265 |
| Apr 02 2015 | R$ 4.6722 | R$ 4.6747 |
| Apr 01 2015 | R$ 4.6762 | R$ 4.6775 |
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.