From the St Louis Fed President:A predictable, explained framework is part of what makes a central bank democratically legitimateIf the public understands the framework, private expectations line up with the Fed's intentions, improves trade-offs between inflation and employmentA well-communicated framework also guards against inflationary and deflationary spiralsDelegated power over interest rates also obligates the Fed to explain 'how and why that power is used'Market guess 'adds noise,' and results in higher and more volatile interest rates and financing costs for businesses and householdsThe 'hall of mirrors' occurs when the Fed announces a forecast, not a frameworkCommunicating the framework makes policy more effective, lowers costs for households and businessesA central bank that keeps its framework to itself forces market participants to guess at its reaction, rather than focusing on dataCentral banks should avoid communications and actions with no framework to make sense of themCentral banks should also avoid 'exiting the conversation altogether,' would pose risks in terms of inflationA well-articulated framework should include two or three likely scenariosCentral bankers needn't make promises, but should tell the public how and why the central bank makes policy decisionsSt. Louis Fed President Alberto Musalem delivered a speech on central bank communication and there's nothing worth trading because it's a philosophy lecture.Musalem argues that the Fed should communicate a reaction function rather than a forecast, warning that announcing forecasts creates a "hall of mirrors" where markets and policymakers chase each other's projections. That's a thinly veiled knock on the dot plot and on forward guidance that promises a path rather than explaining the conditions behind it. The comments also widely echo early criticisms of Warsh's communication strategy, which seems to have now shifted. He warns against exiting the conversation altogether," which he says would pose inflation risks. That reads as pushback against the camp that wants the Fed to speak less and rely less on guidance. Musalem's alternative is a middle ground: lay out two or three likely scenarios, make no promises, but explain the how and why.It's all sensible but I don't know how this big 'change' at the FOMC is going to amount to anything different. They like to talk and they answer questions, that's plenty for the market to go on. This article was written by Adam Button at investinglive.com.