shares of southwest airlines co luv edged up 04 toward a 4week high in premarket trading thursday after the air carrier updated its secondquarter estimates in the wake of “strong” travel demand during the memorial day weekend the company’s estimate for the yearoveryear change in revenue per available seat miles asm improved to a decline of 8 to 10 from a decline of 8 to 11 the outlook for capacity was unchanged at up approximately 14 while the outlook for economic fuel costs per gallon was revised higher to approximately 255 from 245 to 255 “second quarter 2023 leisure travel demand and yields