In normal times, an aggressive central bank campaign to cut interest rates would provide fodder for stock market bulls. That’s not happening in Brazil. Its interest rate, the Selic, has fallen 350 basis points since last August and is likely to fall further at this week’s meeting to a record low of 8.5 percent. Yet the Sao Paulo stock market is among the world’s worst performers this year, with losses of around 4 percent. That’s better than fellow BRIC Russia but far worse than India and China.