The University of Michigan's preliminary December consumer sentiment index reading was 82.5, compared to the final November 75.1, the preliminary November 72.0, and the final October 73.2, according to market sources.
The expectations index was 72.7, compared to 66.8 in November, 62.3 earlier in November, and the final October 62.5.
The current conditions index was 97.9, compared to 88.0 in November, 87.2 earlier in November, and the final October 89.9.
Economists polled by Thomson Reuters had predicted a 76.0 reading for the main index, 90.0 for current conditions and 68.0 for expectations.
The five-year inflation expectation index was 2.8%, compared to 2.9% in November, while the one-year inflation expectation index was 3.0%, compared to 2.9% in November.
The University of Michigan index is not released to the press, but only to paying subscribers.