The Fed should weigh the effects of a rate rise on global economies and expect some serious volatility in financial markets, Fed vice chair Stanley Fischer said. “The US economy and the economies of the rest of the world have important feedback effects on each other … To make coherent policy choices, we have to take these feedback effects into account … The actual raising of policy rates could trigger further bouts of volatility, but my best estimate is that the normalization of our policy should prove manageable for the emerging market economies,” he said.