Shares of glass and coatings manufacturer Ferro Corporation (NYSE: FOE) soared as much as 11.6% on Wednesday before retracing to close the day up 9.6%.Ferro reported a $0.26-per-share profit for its fiscal first quarter 2017, reversing its year-ago loss and beating analyst estimates for $0.25 per share. Q1 revenues of $320.6 million likewise exceeded the consensus estimate of $300.6 million.What really got investors excited about Ferro's report, though, may not have been the earnings it reported, but the earnings it expects to report later this year.