What a week it’s been. Wall Street rallied Friday but all three major indexes closed the week in the red as President Donald Trump’s budding trade war has sent jitters through US markets.

U.S. stocks are rallying Friday, though not by enough to keep Wall Street from heading toward a fourth straight losing week, which would be its longest such streak since August. The S&P 500 was 1.8% higher in midday trading,

The S&P 500 is now more than 10 percent below its last record high — a line in the sand for investors worried about a sell-off gathering steam.

Stock futures were bouncing back early Friday after retreating enough on Thursday to push the S&P 500 into a correction. A correction is when the index falls 10% from its most recent peak and is seen as an important marker for traders.