Sphere Entertainment Co. (NYSE:SPHR) upgraded from "Neutral" to "Buy" by Seaport Global.Partnership with Delta Air Lines for the Delta SKY360° Club, enhancing Sphere's brand presence in the hospitality sector.SPHR's stock shows significant activity with a current price of 91.37,indicatinginvestorinterestandmarketvolatility.SphereEntertainmentCo.(NYSE:SPHR)recentlyreceivedanupgradefromSeaportGlobal,movingfroma"Neutral"toa"Buy"rating.ThischangecamewhenSPHR′sstockwaspricedat ...