Macy’s on Wednesday reported quarterly earnings that topped analysts’ expectations, saying strong digital sales boosted results, while the retailer continues to make investments to improve its stores. The department store chain also raised its earnings outlook for the full year, expecting a strong holiday season. Its shares whipsawed on the news, however, climbing more than 2 percent Wednesday morning but recently were down nearly 8 percent. The stock has rallied more than 80 percent from a year ago. And some analysts say they’re still waiting to see if Macy’s can pull off a strong fourth quarter, where it faces tougher comparisons.