KEY POINTS
  • President Trump's extension of the coronavirus guidelines to April 30 helped calm some of the anxiety of investors, who were concerned the government and medical experts were at odds on when to reopen the economy.
  • That development, as well as some announcements from health companies, helped boost stocks Monday.
  • Johnson & Johnson shares jumped on news it has a vaccine it would begin to test on humans in September, and Abbott rose on its plan to provide 50,000 test kits a day that can detect the virus within minutes.
Lights shines still in Times Square as people remain at home to stop the spread of coronavirus on March 29, 2020 in New York City.

President Donald Trump's decision to keep coronavirus safety guidelines in place until April 30, coupled with some promising developments from health companies, has helped calm some of the angst in the stock market, for now. 

The S&P 500 ended up 3.4% at 2,626, and health care was the best-performing sector, up 4.7%. Johnson & Johnson jumped about 8% after the company announced it had a vaccine candidate. Abbott Labs stock also popped on news the company would be able to provide 50,000 test kits a day that could detect the virus in a matter of minutes. Henry Schein Inc. was higher on news of its test kit. Gilead and Eli Lily rose as investors focused on their coronavirus-related treatments.