US stocks ended a rocky week on a down note as the coronavirus continues to strike fear on Wall Street.

After plunging more than 800 points on the open, the Dow Jones industrial average pared back losses somewhat when White House economic adviser Larry Kudlow said the Trump administration is considering a “targeted” stimulus program for businesses hit hardest by the outbreak.

“We’re looking at things like people who may be stranded at home and will lose pay — we want to help them,” Kudlow told Fox Business Network. “Small businesses in certain areas, the geographical areas or certain sectors, we may wish to help them with some cash flow.”

It wasn’t enough to push stocks in to the green, however, as investors fret over the economic impact of the virus, which has reduced air travel and severely crimped manufacturing in China.

The Dow ended the day down 250 points, or 0.9 percent, to 25,864.78. The S&P 500 fell 1.7 percent to 2,972.37, while the Nasdaq index dropped 1.8 percent to 8,575.62.

Investors instead flooded the bond market. The yield on the benchmark 10-year US Treasury note dropped below 0.786 percent Friday, continuing a record-breaking decline this week. Yields move inversely to prices for bonds, which are considered safe-haven assets.