The Central Bank of Brazil sets the SELIC interest rate to control inflation and manage the country's economy. The interest rate is reviewed by the bank's Monetary Policy Committee (COPOM) eight times per year, in meetings held approximately every six weeks. The interest rate currently stands at 13.75% as of March 2023.

For this prediction market, the resolution criteria would be based on the Central Bank of Brazil's official announcement of the SELIC interest rate at the next meeting, which is scheduled to take place on May 2nd and 3rd, 2023. If at least 0.25 percentage points decrease the interest rate from its current level of 13.75%, then the market would resolve as "Yes". If at least 0.25 percentage points do not decrease the interest rate at the end of this period, or if there is no change at the end of this period, then the market would resolve as "No". It's important to note that any changes to the criteria and resolution methodology would need to be specified before the call is launched to avoid ambiguity and ensure that all participants are aware of the terms and conditions of the market.