The US Federal Reserve is expected to keep interest rates unchanged this week, deferring any possible increase until September or December, as policymakers hold out for more evidence of a pickup in inflation, Reuters reported. Central to the debate at the Fed’s July 26-27 policy meeting will be how to reconcile upbeat US economic data, highlighted by strong job gains in June, with a global growth slowdown and other headwinds threatening the inflation trajectory. The inflation measure the Fed prefers to track is currently at 1.6%.