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What is chained CPI?

CPI, which stands for consumer price index, is a formula that looks at how the prices of items change over time. The chained CPI is a twist on that.

30 Seconds to Know: MSNBC national reporter Suzy Khimm discusses a controversial change to social security that the White House decided to keep out of its budget proposal. CPI, which stands for consumer price index, is a formula that looks at how the prices of items change over time. The chained CPI is a twist on that.