US gas prices drop below $4 a gallon for the first time since July

What happened

AAA's daily figures put the national average for a gallon of regular at $3.9788 on Tuesday, down from $4.0093 a day earlier, $4.1493 a week ago and $4.3669 a month ago. CNBC and CBS News both noted it was the first time the average had been under $4 since July. A year ago drivers paid about $3.07. Diesel also eased, to $6.1572 a gallon. On the crude side, the Financial Times (FT) reported that oil fell below $90 a barrel after President Trump pulled back from a threat to strike Iran, and said cheaper crude had helped global stocks recover from last week's sell-off. CNBC said Brent's dip under $90 was brief.

What it means

Two forces are pushing pump prices down at once. The first is crude oil, the biggest single ingredient in gasoline. CNBC reported that Brent, the global benchmark, briefly slipped under $90 on Tuesday, its first time below that level since August, as Trump's comments raised hopes of ending the nearly nine-month conflict between Washington and Iran. ING estimated that oil exports from the Persian Gulf, including pipeline flows, have recovered to roughly 80% to 85% of where they stood before the war. By Tuesday afternoon CBS News put Brent at around $91, a reminder that these are intraday swings rather than settled prices.

The second force is the calendar. Federal rules require stations to sell a summer blend of gasoline, made to limit evaporation, from June 1 to September 15. After that, cheaper winter fuel is allowed, and driving demand usually fades as vacations end. AAA says prices typically drop by about 10 to 30 cents a gallon over the winter. Bespoke Investment Group told CNBC that part of the current relief is simply this normal seasonal pattern.

The milestone needs context. AAA said on November 5 that pump prices were the highest ever recorded for this time of year, and that before 2026 the national average had never topped $4 in November. CBS News reported the average is about $1 higher than when the US and Israel attacked Iran in late February, and that the 2022 Thanksgiving record was $3.58. AAA spokesperson Aixa Diaz told CBS that prices are still far from normal for the season.

Fuel also feeds straight into inflation. Bureau of Labor Statistics figures cited by CNBC show the gasoline index rose 1% in October after a 9.1% jump in September, so the slowdown was already visible before this week's drop. Fed Governor Christopher Waller cautioned on Tuesday that energy prices remain well above where they began the year, and that their final effect on inflation depends on the levels that stick.

The bull case

Cheaper fuel puts money back in household budgets quickly, especially heading into Thanksgiving travel, when GasBuddy's Patrick De Haan expects prices to keep easing. If Gulf oil flows keep recovering and Brent stays near $90, gasoline could drift lower still, helping cool overall inflation. According to the FT, softer crude has already helped global stocks rebound from last week's sell-off.

The bear case

Much of the decline is seasonal, so it says little about whether the underlying energy shock is fading. Pump prices are still roughly 90 cents above last year's level. Eurasia Group's Gregory Brew called a US-Iran deal unlikely, saying neither side has moved its negotiating position. Any setback in talks or new attacks on Gulf supplies could push crude, and then gasoline, back up.