About Calculation of the Daily CPI

The system calculates the Daily Ref CPI from the Monthly Ref CPI. The system then uses the Daily Ref CPI to calculate the Daily TIPS Index Ratio.

Daily Change in Ref CPI = (Next Mth CPI Index - Curr Mth CPI Index) / Days in Curr Mth

Date

CPI-U

 

Daily Change

Formula

Date

CPI-U

 

Daily Change

Formula

7/1/2001

176.900000

0

0.025806452

176.9+ROUND((0*0.0258064516129027),5)

7/2/2001

176.925810

1.00

0.025806452

176.9+ROUND((1*0.0258064516129027),5)

7/3/2001

176.951610

2.00

0.025806452

176.9+ROUND((2*0.0258064516129027),5)

7/4/2001

176.997420

3.00

0.025806452

176.9+ROUND((3*0.0258064516129027),5)

7/5/2001

177.003230

4.00

0.025806452

176.9+ROUND((4*0.0258064516129027),5)

7/6/2001

177.029030

5.00

0.025806452

176.9+ROUND((5*0.0258064516129027),5)

7/7/2001

177.054840

6.00

0.025806452

176.9+ROUND((6*0.0258064516129027),5)

7/8/2001

177.080650

7.00

0.025806452

176.9+ROUND((7*0.0258064516129027),5)

7/9/2001

177.106450

8.00

0.025806452

176.9+ROUND((8*0.0258064516129027),5)

7/10/2001

177.132260

9.00

0.025806452

176.9+ROUND((9*0.0258064516129027),5)

7/11/2001

177.158060

10.00

0.025806452

176.9+ROUND((10*0.0258064516129027),5)

7/12/2001

177.183870

11.00

0.025806452

176.9+ROUND((11*0.0258064516129027),5)

7/13/2001

177.209680

12.00

0.025806452

176.9+ROUND((12*0.0258064516129027),5)

7/14/2001

177.235480

13.00

0.025806452

176.9+ROUND((13*0.0258064516129027),5)

7/15/2001

177.261290

14.00

0.025806452

176.9+ROUND((14*0.0258064516129027),5)

7/16/2001

177.287100

15.00

0.025806452

176.9+ROUND((15*0.0258064516129027),5)

7/17/2001

177.312900

16.00

0.025806452

176.9+ROUND((16*0.0258064516129027),5)

7/18/2001

177.338710

17.00

0.025806452

176.9+ROUND((17*0.0258064516129027),5)

7/19/2001

177.364520

18.00

0.025806452

176.9+ROUND((18*0.0258064516129027),5)

7/20/2001

177.390320

19.00

0.025806452

176.9+ROUND((19*0.0258064516129027),5)

7/21/2001

177.416130

20.00

0.025806452

176.9+ROUND((20*0.0258064516129027),5)

7/22/2001

177.441940

21.00

0.025806452

176.9+ROUND((21*0.0258064516129027),5)

7/23/2001

177.467740

22.00

0.025806452

176.9+ROUND((22*0.0258064516129027),5)

7/24/2001

177.493550

23.00

0.025806452

176.9+ROUND((23*0.0258064516129027),5)

7/25/2001

177.519350

24.00

0.025806452

176.9+ROUND((24*0.0258064516129027),5)

7/26/2001

177.545160

25.00

0.025806452

176.9+ROUND((25*0.0258064516129027),5)

7/27/2001

177.570970

26.00

0.025806452

176.9+ROUND((26*0.0258064516129027),5)

7/28/2001

177.596770

27.00

0.025806452

176.9+ROUND((27*0.0258064516129027),5)

7/29/2001

177.622580

28.00

0.025806452

176.9+ROUND((28*0.0258064516129027),5)

7/30/2001

177.648390

29.00

0.025806452

176.9+ROUND((29*0.0258064516129027),5)

7/31/2001

177.674190

30.00

0.025806452

176.9+ROUND((30*0.0258064516129027),5)

8/1/2001

177.700000

31.00

0.025806452

176.9+ROUND((31*0.0258064516129027),5)

 

All calculations must be rounded up to 5 decimal places (this will be the value based on).

 

  1. Daily Ref CPI Index = (Daily change in Ref CPI * Number of Days from Start of Period)

  2. Round to the decimal precision (value found in the ILB Index Precision)

  3. Add the Start of the Period CPI-U