As Wall Street frets over when the first interest rate hike in nine years will come, Federal Reserve Chair Janet Yellen is sticking to the script. In a speech delivered Friday to the City Club of Cleveland, the U.S. central bank chief reiterated familiar Fed talking points: The economy is improving, unemployment is dropping, inflation is getting close to healthy levels. However, she left herself and her fellow Fed Open Market Committee members enough wiggle room on rates, which probably, but not definitely will be increasing before year's end. "Based on my outlook, I expect that it will be appropriate at some point ... (full story)