 Shares of Big Lots Inc. BIG, -6.70 fell more than 7 in the extended session Monday after the retailer said it has been seeing softening of traffic and sales trends in January caused by the spread of the omicron variant of the coronavirus in addition to winter weather. The company said that could lead to flat to a below-expectations comparable-sales increase for fiscal January, and result in per-share earnings for the quarter between 1.80 and 1.95. 