Wall Street is having a small rebound before the opening bell Friday but remains on track for another dismal week of losses as investors try to anticipate what President Donald Trump's tariffs mean for markets and the broader economy.

The Dow Jones Industrial Average fell 1.5 per cent to 43,191.24, while the S&P 500 lost 1.8 per cent to close at 5,849.72. The Nasdaq Composite saw a steeper decline, dropping 2.6 per cent to 18,350.1

Nvidia reported its fourth-quarter results after Wednesday's closing bell. Investors and analysts have focused on early sales of the company's new Blackwell line.