The consumer price index is a weighted average collection ... The CPI can certainly go down over time, so a change in CPI can be negative, but since it is a measure of weighted average prices ...

The U.S. consumer price index increased more than expected in January, reinforcing the Federal Reserve's message that it was ...

The Consumer Price Index for All Urban Consumers increased 0.5% on a seasonally adjusted basis in January, after rising 0.4% ...