Key TakeawaysShares of Corning, a beneficiary of the artificial intelligence (AI) boom, tumbled Tuesday after the specialty glass maker's second-quarter results and current-quarter guidance missed analysts' expectations.Corning said that it expects third-quarter core EPS between $0.50 and $0.54, while analysts polled by Visible Alpha are looking for $0.55.The company's stock had soared earlier this month after it lifted its second-quarter adjusted earnings guidance on AI fueling demand for its optical produ ...