Shares of Murphy USA (MUSA) plummeted 5.40% in intraday trading on Thursday, despite the company reporting better-than-expected second-quarter earnings. The sharp decline comes as investors weigh the mixed results from the convenience store and gas station operator's latest financial report.

Murphy USA announced late Wednesday that its Q2 earnings rose to $7.36 per diluted share, up from $6.92 a year earlier and surpassing the FactSet analyst consensus of $6.55. However, the company's revenue for the quarter ended June 30 declined to $5.01 billion from $5.45 billion in the same period last year, falling short of the $5.12 billion expected by analysts.

The stock's significant drop despite the earnings beat suggests that investors may be more concerned about the company's top-line performance and overall growth prospects. The revenue miss could be indicating challenges in Murphy USA's core business, possibly related to reduced fuel demand or increased competition in the convenience store sector. Additionally, market participants might be taking profits after the stock's recent strong performance or adjusting their positions based on the company's future guidance, which was not detailed in the available news.