Will annual inflation be 3.5% in September?

Analysis

The official record is plain: the all items index rose 3.4 percent for the 12 months ending August, matching July's pace exactly. That is the freshest hard number we have, and it sets the baseline everything else has to move from. Underneath that headline figure, the pressure points are uneven. Gasoline jumped 3.9 percent in August alone, accounting for more than a third of that month's increase, while the broader energy index is up 16.3 percent over the year. That is a volatile, fuel-driven push, not a broad-based acceleration. Core inflation, which strips out food and energy, rose 0.3 percent after increasing 0.2 percent in July, according to the official release. That is a slight firming, but it is a single month of data and nothing in the record ties it directly to a jump in the annual headline number. Regional detail matters too. The South's all items CPI-U rose 3.1 percent over the year to August, running below the national figure, a reminder that the national print is an aggregate of uneven regional pressures. Getting from 3.4 percent to exactly 3.5 percent in one month is a specific, narrow target, and nothing in the current record points to that particular jump. The number to watch is the September Consumer Price Index release itself, due October 14, which will show whether energy costs kept climbing or cooled off.