Corning, a U.S.-based manufacturer of glass and ceramic materials, reported its second-quarter financial results on Tuesday, with both revenue and profits exceeding market expectations. However, the company’s third-quarter revenue guidance fell short of market expectations, with core sales guidance ranging from $4.9 billion to $5.0 billion—the upper end of the range was in line with expectations, while the midpoint was slightly below the consensus. As a result, Corning’s stock price plummeted by more than 15% in premarket trading.