This article investigates the effects of the US money supply shock on global business cycles by employing a global vector autoregressive model containing 26 economies over the period from 1979Q2 to 2009Q4. The US money supply is incorporated as an endogenous variable for the US and a global factor for other economies. When a positive US money supply shock hits the global economy, developed economies (such as the US, Euro area and the UK) will have neither real output decline nor inflation pressu