Wall Street kicks off second-half with losses on slowdown worries

Wall Street started the second half of the year on a dull note on Friday as investors worried over the risks to economic growth from the Federal Reserve’s resolve to curb rising prices at all costs.

As the U.S. central bank moves away from easy money by raising borrowing costs, investors for much of the year have been selling equities, pushing the benchmark S&P 500 to close out its worst…