TY - JOUR AU - Christiano,Lawrence AU - Ilut,Cosmin L. AU - Motto,Roberto AU - Rostagno,Massimo TI - Monetary Policy and Stock Market Booms JF - National Bureau of Economic Research Working Paper Series VL - No. 16402 PY - 2010 Y2 - September 2010 UR - http://www.nber.org/papers/w16402 L1 - http://www.nber.org/papers/w16402.pdf N1 - Author contact info: Lawrence Christiano Department of Economics Northwestern University 2001 Sheridan Road Evanston, IL 60208 Tel: 847/491-8231 Fax: 847/491-7001 E-Mail: l-christiano@northwestern.edu Cosmin L. Ilut Department of Economics Duke University 223 Social Sciences Building Box 90097 Durham, NC 27708 Tel: 919/660-1844 E-Mail: cosmin.ilut@duke.edu Roberto Motto European Central Bank Postfach 16 03 19 D-60066 Frankfurt am Main GERMANY E-Mail: roberto.motto@ecb.int Massimo Rostagno European Central Bank Postfach 16-03-19 D-60066 Frankfurt am Main GERMANY E-Mail: Massimo.Rostagno@ecb.int AB - Historical data and model simulations support the following conclusion. Inflation is low during stock market booms, so that an interest rate rule that is too narrowly focused on inflation destabilizes asset markets and the broader economy. Adjustments to the interest rate rule can remove this source of welfare-reducing instability. For example, allowing an independent role for credit growth (beyond its role in constructing the inflation forecast) would reduce the volatility of output and asset prices. ER -