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Chile's economic activity rose 2.6 percent in December from the same month a year ago, due to an increase in commerce and services, the bank said in a statement.
The IMACEC economic activity index, encompassing about 90 percent of the economy tallied in gross domestic product figures, came in above a Reuters forecasts of a 2.2 percent increase.
Compared with November, economic activity increased a seasonally adjusted 0.3 percent.