Consumer prices generally declined during the month of November, giving the purchasing power of U.S. savings accounts a rare boost. This was an encouraging development, but it's not likely to be a long-term solution for getting more value from savings accounts. Last Friday, the Bureau of Labor Statistics announced that the Consumer Price Index (CPI) declined by 0.3 percent during November. This episode of deflation represents a reversal of a trend from just a few months ago, when inflation seemed to be getting out of hand. However, some additional details from the CPI report suggest that you should not expect falling prices to become the norm.