This paper uses multiple cointegration analysis to estimate simultaneously a monetary reaction function and the determinants of expected inflation for Brazil, Chile, Colombia, and Mexico. In addition, M-GARCH modeling is used to test for the presence of volatility spillovers between the monetary stance and inflation expectations. The analysis shows that there are long-term relationships between the interest rate, expected inflation, and the inflation target, and that greater volatility in the monetary stance increases the volatility of expected inflation in Brazil, Colombia, and Mexico. Copyright (c) 2009 The Ohio State University.