Concerns over the economy drove down consumers' spending last month, according to Discover Financial Services.

The Riverwoods, Ill., credit card company's monthly Spending Monitor index fell to a record low of 79.7 in November as 64% of the respondents said the U.S. economy was in poor condition, a record high and a 30-point jump from a year earlier. The index was pegged at 100 when it was introduced in 2006.

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