The Consumer Price Index, or CPI rose 0.2% in September, down from a 0.4% increase in August and down 1.3% from a year ago. If food and energy prices are stripped out to get to core inflation, prices also rose 0.2%, up from 0.1% in August. Core inflation is up 1.5% from a year ago. On a year-over-year basis, those numbers are likely to flip in the coming months. Food prices actually declined slightly for the month, with a 0.1% decline in September reversing a 0.1% increase in August, and unchanged from a year ago. In particular, the price for food at home fell 0.3% in September after being unchanged in August. On a year-over-year basis, prices at the grocery stores are down 2.5%. This is not good news for firms like Kroger's (KR) and Supervalu (SVU). It is energy that is the big difference between ...