The Globe and Mail reports in its Thursday edition that U.S. stocks ended sharply lower on Wednesday as Nvidia warned about steep charges from new U.S. curbs on its chip exports to China and as Federal Reserve chair Jerome Powell said U.S. economic growth may be slowing. A Reuters dispatch to The Globe says the Toronto Stock Exchange managed to end slightly in the green, thanks to rallies in the materials and energy sectors, as gold spiked to another record high. Mr. Powell, in remarks at the Economic Club of Chicago, said larger-than-expected tariffs likely mean higher inflation and slower growth. But he noted that the U.S. economy is still in a strong position, and that the Fed is waiting for greater clarity before considering policy changes. Mr. Powell called U.S. President Donald Trump's tariff plans "fundamental changes" that do not provide businesses and economists with any clear parallels to study. In contrast to Wall Street, the S&P/TSX Composite Index ended up 38.86 points at 24,106.79, its fourth straight day of gains. The Bank of Canada paused its interest-rate cutting campaign and said that a long-lasting global trade war could trigger a significant recession in Canada and lead to higher inflation.