International Speedway ( ISCA), a promoter of motorsports, said its second-quarter earnings rose 15.8% from a year ago, on improved revenue. The Daytona Beach, Fla.-based company earned $30.7 million, or 58 cents a share, in the quarter, compared with $26.5 million, or 50 cents a share, a year ago. Analysts polled by Thomson First Call were expecting earnings of $29.7 million, or 57 cents a share. Second-quarter revenue rose 9.3% from a year ago to $172.1 million as against analysts' expectation of $170.2 million. Second-quarter revenue was helped by improved television and media revenues combined with higher corporate sponsorship, hospitality and attendance-related revenues. The company said that its lower than expected results at Michigan and Daytona will impact its third-quarter earnings by about 10 cents a share to 12 cents a share. For the full year, the company expects to earn $3.20 a share to $3.25 a share, including litigation charge of 5 cents a share to 6 cents a share, on revenue of $785 million to $795 million. Analysts forecast earnings of $3.27 a share on revenue of $799.2 million for the full year. "Consumer demand remains strong, and we expect growth in corporate partner sponsorship and hospitality to contribute to our overall revenue and earnings growth. In addition, we continue to make progress in our efforts to maximize efficiencies by leveraging our scale and reducing operating costs moving into fiscal 2007 and beyond. We are excited about the remainder of this fiscal year and remain focused on enhancing long-term shareholder value," the company said. Second-quarter operating income rose 11.3% from a year ago to $52.2 million and operating margin was up 53 basis points to 30.3%. Dividend for the company's second quarter was up 33.3% from a year ago to 8 cents a share.