This blog had written in a post ‘Inflation is now moderating. WPI will fall below 10% in July‘ a month ago, that inflation would fall below 10% for July (the data came yesterday).
WPI for July is 9.97% as per data that came out yesterday. Our forecast was 9.7%. A table from that July post..
| Feb-10 | Mar-10 | Apr-10 | May-10 | Jun-10 | Jul-10E | |
| Govt WPI | 9.9 | 9.9 | 9.6 | 11.14 | 10.6 | |
| WPI-Wisdomsmith | 10.5 | 11.7 | 11.7 | 11.3 | 11.5 | 9.7 |
Note this line from a newsreport –
Data released on Monday showed that the wholesale price index-based inflation rose to 9.97% in July, below 10.55% for June and a Reuters forecast of 10.39% for the month. The lower-than-anticipated figures will provide some relief to the embattled government.
So full time practising economists had an ‘average’ forecast of well above 10%.
Also note this line –
However, headline inflation for May has been revised upwards to 11.14% as compared to the provisional figure of 10.16%.
Now see the May column in the table above. See how the revised data has come closer to our data..
My point is simply this — ET’s Commodity Index (with some modifications) is a very good proxy for wholesale inflation. Our WPI numbers are derived from ETCI. And you have it real time (a day’s delay), unlike WPI which comes a month late. WPI did deviate a lot from it a few months ago, but when it did, the government data was wrong (or more likely manipulated).

