| Month | Class III | Mailbox |
|---|---|---|
| Mar 2012 | 15.72 | 17.28 |
| Apr 2012 | 15.72 | 16.74 |
| May 2012 | 15.22 | 16.27 |
| Jun 2012 | 15.44 | 16.48 |
| Jul 2012 | 15.65 | 16.59 |
| Aug 2012 | 15.96 | 16.88 |
| Sep 2012 | 16.17 | 17.08 |
| Oct 2012 | 16.14 | 17.80 |
| Nov 2012 | 15.99 | 17.65 |
| Dec 2012 | 15.89 | 17.56 |
| Jan 2013 | 15.64 | 17.20 |
| Feb 2013 | 15.45 | 17.02 |
| Mar 2013 | 15.55 | 17.12 |
| Apr 2013 | 15.51 | 16.54 |
The Mailbox Price was regressed on the Class III price from 2001-01-01 to 2012-02-01. Then, the Mailbox price is predicted using the formula:
where Q1, Q2 and Q3 are 0 or 1 according as whether the price pertains to quarters 1, 2 or 3. For the Class III price, we use the Announced Class III Price until Apr 2012, and the Class III Futures Settle Price henceforth.
| Class III | Q1 | Q2 | Q3 | Intercept | |
|---|---|---|---|---|---|
| Coefficient | 0.951 | -0.118 | -0.652 | -0.745 | 2.445 |
| Standard Error | 0.011 | 0.101 | 0.102 | 0.101 | 0.179 |