Southwest Airlines is one of the most mentioned companies in the U.S. across all news items in the last 12 hours, according to Factiva data. Southwest had a loss of $219 million, or 37 cents a share, in the fourth quarter. Revenue rose almost 11% to $6.82 billion, above the $6.75 billion analysts expected, according to Factset. Adjusted earnings were 37 cents a share, well above analysts’ expectations for 12 cents a share. Southwest said it plans to increase flying capacity by about 10% in the first three months of 2024, and about 6% for the full year. It expects non-fuel costs to rise 6% to 7% in 2024. Southwest flight attendants on Tuesday voted to authorize a strike, their union said, after members rejected a tentative agreement last month.