Tiffany, like its luxury peers, has temporarily closed stores in the United States and Canada as a precaution against the spread of the COVID-19 coronavirus outbreak. Image credit: Tiffany U.S. jeweler Tiffany & Co., which shuts its North American stores over the COVID-19 outbreak, reported net sales for its fiscal fourth quarter ending Jan. 31 were up 3 percent to $1.4 billion, while annual revenue for the full year was down 1 percent on a comp-sales basis to $4.4 billion.