U.S. weekly jobless claims at nine-month low; productivity rebounds

WASHINGTON (Reuters) - The number of Americans filing for unemployment benefits dropped to a nine-month low last week, suggesting a tightening labour market would continue keep the longest economic expansion in history on track.The economy is, however, likely to remain on a moderate growth path, with other data on Thursday showing worker productivity rebounding less than expected in the fourth quarter. Sluggish productivity is one of the reasons the economy has struggled to achieve the Trump..