Wall St. ends lower after Fed keeps rates unchanged

Wall Street ended lower on Wednesday after the Federal Reserve left interest rates unchanged but opened the door to a possible rate increase later this year. The Fed had not been expected to move interest rates at its two-day meeting, ended on Wednesday, but investors have been anxious for hints about when an increase might come in light of concerns about fallout from Britain's vote in June to leave the European Union. "A rate increase is warranted this year, most likely at the end of the year,