The U.S. Fourth Quarter GDP growth was reported two days ago at 2.6% and that stunned everyone who were expecting a much higher number. All U.S. economic indicators including U.S. Holiday consumer spending, which accounts for around two-thirds of total GDP, were off the charts in the fourth quarter growing +5.5% over the prior holiday.
The total growth in fourth quarter consumer spending was almost four percent (3.8%), that’s the highest rate of consumer spending in well over two years. Q4 investment in new housing increased 11.6%, business spending on equipment surged 11.4% and outlays on structures edged up 1.4%.
Before the BEA (Bureau of Economic Analysis) announcement, everyone predicted 4th quarter GDP growth would easily be over 3%, and most likely in the 3.5 to 4.0% range.
So what gives. Why did the Q4 GDP only grow at 2.6% ?

It seems a little funny to be griping about 2.6% growth because, well, that’s really good, Bigly even; so hopefully those within the Commerce Department don’t take this review personally. But, c’mon, we expected more… Well, the answer to the question is actually in the first few paragraphs of their release, and later in the deep weeds of the data. I’ll explain.
First, the part of the announcement to note carefully:
[…] The Bureau emphasized that the fourth-quarter advance estimate released today is based on source data that are incomplete or subject to further revisionby the source agency (see “Source Data for the Advance Estimate” on page 3). The “second” estimate for the fourth quarter, based on more complete data, will be released on February 28, 2018.
The “source data for the advance estimate” is another set of separate analytical disclaimers (pdf here) which informs users there are economic data-sets that contain ‘less than‘ three months of information. To see what data is missing, and what “assumptions” the BEA recommends, you to travel to a third level of depth (LINK HERE), and then to the key source data and BEA assumptions (excel spreadsheet here).
Don’t try this at home without a pocket protector and guidebook to the fourth level of Dantes inferno. So let me try to make this easy.
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