The U.S. service sector continued expanding in December, though at a slightly slower rate than the prior month, a key index showed Wednesday.
The Institute for Supply Management said its non-manufacturing index stood at 55.3 in December, slightly down from November's reading of 55.9. A reading above 50 indicates overall expansion in service-sector activity.
Economists surveyed by The Wall Street Journal expected the index to hit 56.3 in December.
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