(The Day Ahead is an email and PDF publication that includes the day's major stories and events, analyses and other features. To receive The Day Ahead, Eikon users can register at . Thomson One users can register at RT/DAY/US. All times in ET/GMT) A fretful global economy and suddenly volatile markets will form the backdrop for the U.S. Federal Reserve's two-day policy meeting. There is no press conference and no new individual economic forecasts due from policymakers. But the statement at 2 p