Wall St trims gains after Yellen remarks

Wall Street trimmed gains in early afternoon trading on Friday after Federal Reserve Chair Janet Yellen said it would likely be appropriate to raise rates "in the coming months." Investors are looking for clues on the timing of the next rate hike from Yellen's speech, which comes after comments from several policymakers earlier this week that the U.S. economy has the capacity to absorb a rate hike. "The economy is continuing to improve ... growth looks to be picking up," Yellen said in remarks i