| Date | Bid | Offer |
|---|---|---|
| Jul 31 2014 | R$ 3.8275 | R$ 3.8296 |
| Jul 30 2014 | R$ 3.7925 | R$ 3.7947 |
| Jul 29 2014 | R$ 3.7722 | R$ 3.7737 |
| Jul 28 2014 | R$ 3.7874 | R$ 3.7896 |
| Jul 25 2014 | R$ 3.7821 | R$ 3.7842 |
| Jul 24 2014 | R$ 3.7692 | R$ 3.7705 |
| Jul 23 2014 | R$ 3.7809 | R$ 3.7823 |
| Jul 22 2014 | R$ 3.7733 | R$ 3.7752 |
| Jul 21 2014 | R$ 3.7934 | R$ 3.7956 |
| Jul 18 2014 | R$ 3.8155 | R$ 3.8170 |
| Jul 17 2014 | R$ 3.8303 | R$ 3.8318 |
| Jul 16 2014 | R$ 3.8002 | R$ 3.8023 |
| Jul 15 2014 | R$ 3.8047 | R$ 3.8064 |
| Jul 14 2014 | R$ 3.7857 | R$ 3.7879 |
| Jul 11 2014 | R$ 3.8013 | R$ 3.8028 |
| Jul 10 2014 | R$ 3.8059 | R$ 3.8074 |
| Jul 09 2014 | R$ 3.7903 | R$ 3.7924 |
| Jul 08 2014 | R$ 3.7906 | R$ 3.7925 |
| Jul 07 2014 | R$ 3.8011 | R$ 3.8026 |
| Jul 04 2014 | R$ 3.7966 | R$ 3.7981 |
| Jul 03 2014 | R$ 3.8204 | R$ 3.8219 |
| Jul 02 2014 | R$ 3.7972 | R$ 3.7995 |
| Jul 01 2014 | R$ 3.7804 | R$ 3.7818 |
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.