Saia, Inc. (NASDAQ:SAIA) stock fell on Wednesday as investors weighed mixed fourth-quarter freight trends against confidence in the company's long-term national expansion strategy.Earlier this month, Saia provided fourth-quarter LTL operating data, where it said October LTL shipments and tonnage per workday fell year over year, while weight per shipment inched higher.In November, shipments and tonnage per workday rose, but weight per shipment slipped versus last year.Also Read: General Mills Cautions About ...