The London Interbank Offered Rate (LIBOR) is a widely used indicator of funding conditions in the interbank market. As of 2013, LIBOR underpins more than $300 trillion of financial contracts, including swaps and futures, in addition to trillions more in variable-rate mortgage and student loans....

Using federal funds futures data, we show the importance of surprise communication as a component of monetary policy for U.S. macro variables, both before and after 2008. While Gürkaynak et al. (2005) stress the importance of monetary policy communication for asset prices, much of the...