UPDATE: There is some discrepancy in the amount of total units sold by Ford Motor Company in July, which may mean it was not outsold by Toyota Motor Company. We're investigating and will update the above paragraph when we're certain we have correct numbers.
UPDATE 2: The mystery has been solved. We attempt to get all sales figures straight from the manufacturer, but often crosscheck and fill in holes using other sources, in this case Automotive News. Unbeknownst to us, however, AN subtracts sales of the F-650 and F-750 commercial trucks from Ford's overall numbers. The automaker sold 635 units of those trucks in July. Subtract them from Ford's overall sales, and you get the number reported by AN to be lower than Toyota Motor Company's overall sales. Add in my own carelessness, and you get the nonsensical, now-retracted paragraph above. We see no reason those commercial truck sales should be subtracted from Ford's total, so in our estimation, Ford actually sold 321 more units in July than Toyota.
Even more conspicuous is the poor sales performance by Infiniti last month. Nissan's luxury arm in the US saw sales fall 33.2 percent in July, far and away the biggest drop of any brand. In fact, no other brand even experienced a double-digit sales dip. Fortunately, Infiniti's fall was more than offset by a strong 16.79-percent rise in Nissan sales.
Check out the full sales figures in the chart below.
*Brands and companies are displayed in descending order according to their percentage change in volume sales. There were 25 selling days in July 2013 and 24 selling days in July 2012, so there is a difference between the change in monthly sales volume and the change in average daily sales rate (DSR) for each brand/company. Also, brands are combined and reported as companies only if their sales figures are released jointly.