Global Partners heads into its September-quarter report with an unusual setup: the partnership has just strung together two of its strongest quarters in recent memory, yet the stock has slipped since its last release, and Wall Street is already penciling in a sequential step down. The question is whether the retail fuel margin that powered the June quarter, a cycle-high 50 cents per gallon at its gasoline distribution and station operations segment, was a peak or a new baseline.

Consensus calls for earnings of $1.61 per unit on revenue of $7.41 billion. Against a year-ago quarter of $0.66 and $4.69 billion, that is a dramatic jump of roughly 144% in earnings and 58% in revenue, but the year-over-year comparison flatters the picture because last year's third quarter was one of the softer stretches management has since moved past. The more telling comparison is sequential. Analysts expect earnings to fall from $1.86 last quarter even as revenue climbs from $6.79 billion, which implies the Street is assuming higher product prices flow through the top line while per-gallon profitability cools. Management offers no formal earnings or EBITDA guidance, having only reaffirmed capital spending plans of $60 million to $70 million for maintenance and $75 million to $85 million for expansion, so the consensus is essentially a bet on margin normalization rather than a number anchored to company targets.

That makes retail fuel margin the swing factor. The gasoline margin climbed from 37 cents a year ago to 41, 45 and then 50 cents over successive quarters, lifting segment product margin by more than $37 million and pushing adjusted EBITDA to $148.2 million. A print that holds in the mid-40s would likely support results at or above the consensus, while a slide back toward the low 40s would suggest the June quarter benefited from unusually favorable pricing. Management's own caution matters here: it flagged modestly softer consumers making smaller fill-ups and trading down from premium to regular, a pattern it has described since late last year. Any evidence that volume weakness is deepening would weaken the case that margins, not throughput, can carry earnings.

Wholesale is the other pressure point. Distillates and residual oil margins fell to $28.1 million in the June quarter on weaker resid, and the summer months are seasonally quiet for heating products. Management also warned that a steeply backwardated forward curve raises the cost of carrying hedged inventory, a headwind that could show up in this report. Wholesale gasoline, which rose nearly $20 million year over year, will need to keep doing heavy lifting.

Balance sheet progress offers a cushion. Leverage dropped to 2.85 times from 3.6 times a year earlier, distribution coverage rose to 2.25 times, and the partnership redeemed its 9.5% Series B preferred units on July 30, inside this reporting period. That redemption should begin trimming fixed charges on the common units, and a continued streak of distribution increases from the current $0.78 per quarter would signal confidence. Management also described the acquisition landscape as busy, so commentary on deals could shape the tone as much as the numbers.

Sentiment has warmed considerably, rising to 34.5% bullish from just 6.5% ahead of the last report, yet the units are down 3.8% since then, trailing the S&P 500 by four points. At $47.28, the stock sits just below its 200-day average of $47.96 and near the bottom of its post-earnings range of $45.73 to $54.29. That combination suggests the market is skeptical that peak margins will last. The report ultimately hinges on whether retail fuel margins settle at a level high enough to keep coverage comfortably above 2 times despite carry costs and seasonal wholesale softness. If they do, the improving narrative from the last two quarters holds; if they fade sharply, the June quarter will look like the high-water mark.