Murphy USA (MUSA) is trading lower on May 1, 2026, as the market digests its Q1 2026 update from late April. While the quarter showed a sharp year-over-year improvement in profitability, investors appear to be rotating out after the immediate earnings reaction and re-centering on the less favorable line items that can pressure near-term earnings quality.

Murphy USA’s Q1 2026 release showed a big jump in net income to $136.3 million from $53.2 million a year earlier, with diluted EPS rising to $7.28 from $2.63 and Adjusted EBITDA increasing to $277.9 million from $157.4 million. The company highlighted higher fuel and merchandise contribution, with total fuel contribution rising to 35.0 cents per gallon and retail fuel margin improving to 25.4 cents per gallon, alongside slightly higher chain fuel volumes year over year. (s22.q4cdn.com)

The same release flagged meaningful offsets to the stronger margin backdrop: higher income taxes, increased store and other operating expenses (including payment fees), higher depreciation and amortization, and higher interest expense. The effective tax rate was about 22.6% in Q1 2026 versus 14.1% in Q1 2025, and total store and other operating expenses rose to $279.8 million from $266.1 million. This combination can compress incremental upside from fuel/mix improvements, helping explain why the stock is down even with better top-line operating metrics. (s22.q4cdn.com)

Investors will likely focus on whether elevated fuel contribution (including the fuel supply and RINs-related contribution) is sustainable as volatility normalizes, and whether expense and tax pressures ease as the year progresses. Share repurchases remain a support—Murphy USA repurchased about 169 thousand shares in Q1 for $70.9 million, with additional authorization capacity available—but near-term trading is being driven by the market’s reassessment of forward earnings power after the earnings catalyst. (s22.q4cdn.com)