It works as a changing of correction ratios over the fixed value in the contract, basing in safe rules and legal guarantees.
All the different contracts of Swap of the BM&FBOVESPA are gathered in one only one, that is called of Contract by Term of Changing and Profitability. This simplifies the attending between the parts of the operational process.
The Swap allows to work with many varieties, combined two to two. Be aware of the main ones: