Brazil's central bank will raise its benchmark interest rate by 50 basis points on November 6, according to a Reuters poll, a possible second step in its short-term tightening campaign that contrasts sharply with policy easing in most markets around the world. The central bank's monetary policy committee, Copom, raised its benchmark rate by 25 basis points last month for the first time in two years and signalled more adjustments to come in response to a challenging inflation outlook. According to a Reuters poll dated October 21-25, the median estimate of 34 economists showed that Copom could raise the benchmark Selic rate from 10.75% to 11.25%. Of these economists, 30 expected an increase of 50 basis points, and four predicted a further increase of 25 basis points.