Complex Average growth formula

[DRExcel515]

In the tables below I've outlined a small sample of the data I currently have. On the first table "Raw Data" is a specific fund code with multiple month-end dates in the second column and that funds current yield for each of those month-ends in the 3rd column. Now some of the funds in this spreadsheet may have (null) values for certain month ends (which complicates this but I can't change it as it comes that way out of the database). The second table lists out a few distinct fund codes in column 1 and in column 2 I am trying to calculate the average month over month change in the current yield on the 1st table or the "Raw Data" tab. I would need to ignore the (null) values if they occur for specific fund codes on certain month-ends. Any help would be much appreciated!



First Table is on "Raw Data" Tab

Fund Code	Month End	Cur Yield	Month/Month
BACHU <tbody> </tbody>	8/31/2017	3.21
BACHU <tbody> </tbody>	9/30/2017	3.26	=(3.26/3.21)-1
BACHU <tbody> </tbody>	10/31/2017	3.43	=(3.43/3.26)-1
BACHU <tbody> </tbody>	11/30/2017	(null)	Not Available
BACHU <tbody> </tbody>	12/31/2017	3.212	Not Available
BACHU <tbody> </tbody>	1/31/2018	3.35	=(3.35/3.212)-1
BACHU <tbody> </tbody>	2/28/2018	3.25	=(3.25/3.35)-1

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Second Table is on "Sheet1"

Fund Code <tbody> </tbody>	Average Change of the Month/Month column above <tbody> </tbody>
BACHU <tbody> </tbody>
BBGAC <tbody> </tbody>
BBMUH <tbody> </tbody>
BC15T <tbody> </tbody>
BCEAG <tbody> </tbody>
BCGAC <tbody> </tbody>

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