Last week, the researchers who put out the Thomson Reuters/University of Michigan Survey of Consumers said their index rose in May to "its highest level since October 2007" — before the last recession began.

But when it comes to economics, there always seem to be an "on the other hand" moment coming — especially when the economy appears to be at a turning point.

And voila: The private Conference Board says its consumer confidence index fell in May by nearly four points, to its lowest level in four months.

Support for GBH is provided by:

"Consumers were less positive about current business and labor market conditions, and they were more pessimistic about the short-term outlook," says Lynn Franco, the board's director of economic indicators, in a statement released with its report.

But, she adds, "consumers were more upbeat about their income prospects, which should help sustain spending."

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