#margin sales

US auto sales fell by 4 percent in the third quarter

Vehicle sales are slowing down despite a run on big SUVs. Major automakers said Tuesday that U.S. sales fell 7 percent in September and 4 percent for the June-through-September quarter, compared with the same periods last year.

Weaker numbers for September and the third quarter wiped out a 1.8 percent gain during the first half of the year, and left auto sales on pace with 2017. Some analysts had…