The world’s most widely followed stock-market benchmark – the S&P 500 – is now down more than 10 per cent from its peak. PHOTO: AFP NEW YORK – The world’s most widely followed stock-market benchmark slid into a correction on March 13, a drop that underscores how the two-year-long bull market is running out of steam in the early days of the Trump administration. The move stems from investors’ growing pessimism about the whipsawing policy pronouncements from Washington over the past few weeks. On-again, off-again tariffs and mass layoffs of federal workers have fomented unease on Wall Street. On March…