Ibovespa Enters Bear Market as Oil Prices Sink Petrobras

In October, Petrobras, a state-run oil producer, experienced a 14% decline over five days, contributing to a 5.3% drop in the Brazilian index. Despite higher interest rates, Brazil's retail sales increased by 1% in October, surpassing forecasts. The central bank raised the benchmark index to its highest level in over three years to manage inflation, leading to higher borrowing costs for consumers.

What was the change in sales after September according to the text?

What action did the central bank take to control inflation?