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By the numbers: Americans are clueless about the stock market's growth

Data: Betterment survey of 1,602 U.S. adults who were age 18 or older in 2008. Margin of error ±2.45%; Chart: Chris Canipe/Axios

Almost half of Americans think the stock market has failed to rise at all since 2008, according to a new survey from Betterment.

The correct answer is the last one in the chart above: The stock market is up by more than 200%.