 Convenience-store chain Caseys General Stores Inc. CASY, -0.52 late Tuesday reported fiscal fourth-quarter earnings in line with Wall Street expectations and increased its dividend by 9 to 38 cents a share. Caseys said it earned 59.8 million, or 1.60 a share, in the quarter, compared with 41.7 million, or 1.12 a share, in the year-ago quarter. 