September 2008 CPI Data Out
24 10 2008The latest Consumer Price Index (CPI) data is out and this is my monthly update to the projected annual inflation.
If you want more explanation of how I arrive at these numbers visit the May 2008 post. For information on why I am including the December 2007 numbers in these calculations see the June 2008 post.
The inflation so far for 2008:
Southeast = [ ( 212.65 - 203.457 ) / 203.457 ] * 100 = 4.518%
National = [ ( 218.783 - 210.036 ) / 210.036 ] * 100 = 4.165%
Average month to month change in 2008:
| National CPI | Southeast CPI | National ? | Southeast ? | |
| 12/2007 | 210.036 | 203.457 | ||
| 01/2008 | 211.080 | 204.510 | 1.044 | 1.053 |
| 02/2008 | 211.693 | 205.060 | 0.613 | 0.550 |
| 03/2008 | 213.528 | 206.676 | 1.835 | 1.616 |
| 04/2008 | 214.823 | 208.085 | 1.295 | 1.409 |
| 05/2008 | 216.632 | 210.006 | 1.809 | 1.921 |
| 06/2008 | 218.815 | 212.324 | 2.183 | 2.318 |
| 07/2008 | 219.964 | 213.304 | 1.149 | 0.980 |
| 08/2008 | 219.086 | 212.387 | (0.878) | (0.917) |
| 09/2008 | 218.783 | 212.650 | (0.303) | 0.263 |
| Average | 0.972 | 1.021 | ||
Estimated CPI when average change is applied to the rest of the year:
Est. Southeast CPI = 212.65 + ( 3 * 1.021 ) = 215.714
Est. National CPI = 218.783 + ( 3 * 0.972 ) = 221.699
Estimated inflation for 2008:
Southeast = [ ( 215.714 - 203.457 ) / 203.457 ] * 100 = 6.024%
National = [ ( 221.699 - 210.036 ) / 210.036 ] * 100 = 5.553%
