Why should she? Feinstein's assets are held in a blind trust so your question makes no sense.
“During my Senate career I’ve held all assets in a blind trust of which I have no control,” Feinstein tweeted. “Reports that I sold any assets are incorrect.”
Feinstein and her husband, investment banker Richard Blum, sold shares in Allogene Therapeutics, a biotechnology company, according to her financial disclosures. They sold shares on Jan. 13 and Feb. 18. The stock subsequently rose in value, peaking in early March.
At least three other senators, California Democrat Dianne Feinstein, Oklahoma Republican Jim Inhofe, and Georgia Republican David Perdue, also recently sold stock in large quantities, but none of the sales appear timed to have taken advantage of any possible foreknowledge of the downturn.
Burr, however, as chair of the Senate Intelligence Committee, had been receiving intelligence briefings on the threat posed by the virus and had offered reassurance to the public, even saying on Feb. 7 that "the United States today is better prepared than ever before to face emerging public health threats, like the coronavirus." https://www.nytimes.com/2020/03/19/us/politics/richard-burr-stocks-sold-coronavirus.html