WASHINGTON (AP) As the ravages of the novel coronavirus forced millions of people out of work, shuttered businesses and shrank the value of retirement accounts, the Dow Jones Industrial Average plunged to a three-year low.

But for Sen. David Perdue, a Georgia Republican, the crisis last March signaled something else: a stock buying opportunity.

And for the second time in less than two months, Perdues timing was impeccable. He avoided a sharp loss and reaped a stunning gain by selling and then buying the same stock: Cardlytics, an Atlanta-based financial technology company on whose board of directors he once served.

On Jan. 23, as word spread through Congress that the coronavirus posed a major economic and public health threat, Perdue sold off $1 million to $5 million in Cardlytics stock at $86 a share before it plunged, according to congressional disclosures.

Weeks later, in March, after the companys stock plunged further following an unexpected leadership shakeup and lower-than-forecast earnings, Perdue bought the stock back for $30 a share, investing between $200,000 and $500,000.

Those shares have now quadrupled in value, closing at $121 a share on Tuesday.