how to calculate XIRR dynamically in excel and in google sheets - excel

Question

I am trying to calculate XIRR for data that I have in the below format
PurchaseDate Script No.ofunits PurchNAVrate NetAmount ForXIRR TotalReturn
17/11/2014 A 2241 33 75000 -75000 96000
8/1/2015 B 53 649 35000 -35000 43000
14/1/2015 B 75 658 50000 -50000 61500
14/10/2014 C 2319 32 75000 -75000 108000
8/1/2015 D 318 109 35000 -35000 40000
14/1/2015 D 450 110 50000 -50000 57000
8/6/2015 D 175 114 20000 -20000 22000
I tried lots of different permutations and combinations but not able to calculate XIRR for each Fund. Is there a way I can do it perhaps using offset or search.
This is a dynamic list which keeps getting changed based on new funds that are bought or sold
Values for Fund A should be around 14%
Values for Fund B should be around 13%
Values for Fund C should be around 21%
Values for Fund D should be around 8%
Update
Given that solution mentioned by #xor-lx was working very nicely in ms excel but not in google sheets, I have now modified the structure of my data based on #kyle advice and now I can calculate XIRR easily for each fund as a whole. Refer below
PurchaseDate Today Script No.ofunits PurchNAVrate NetAmount ForXIRR TotalReturn XIRR
17/11/14 31/08/2016 A 2241 33 75000 -75000 96000 "=XIRR(G2:H2,A2:B2)"
Total for above fund "=XIRR(G2:H3,A2:B3)"
8/1/2015 31/08/2016 B 53 649 35000 -35000 43000 "=XIRR(G4:H4,A4:B4)"
14/1/2015 31/08/2016 B 75 658 50000 -50000 61500 "=XIRR(G5:H5,A5:B5)"
Total for above fund "=XIRR(G4:H6,A4:B6)"
14 Oct 14 31/08/2016 C 2319 32 75000 -75000 108000 "=XIRR(G7:H7,A7:B7)"
Total for above fund "=XIRR(G7:H8,A7:B8)"
8 Jan 15 31/08/2016 D 318 109 35000 -35000 40000 "=XIRR(G9:H9,A9:B9)"
14 Jan 15 31/08/2016 D 450 110 50000 -50000 57000 "=XIRR(G10:H10,A10:B10)"
8/6/2015 31/08/2016 D 175 114 20000 -20000 22000 "=XIRR(G11:H11,A11:B11)"
Total for above fund "=XIRR(G9:H12,A9:B12)"

Answer 1

Assuming your table is in A1:G8 (with headers in row 1), and that your Fund of choice, e.g. "B", is in J2, array formula**:
=XIRR(INDEX(F:G,N(IF(1,MODE.MULT(IF(B$2:B$8=J2,{1,1}*ROW(B$2:B$8))))),N(IF(1,{1,2}))),CHOOSE({1,2},INDEX(A:A,N(IF(1,MODE.MULT(IF(B$2:B$8=J2,{1,1}*ROW(B$2:B$8)))))),TODAY()))
Copy down to give similar results for Funds in J3, J4, etc.
I tend to prefer this to set-ups involving OFFSET; not only is it briefer (and therefore more efficient), but also, more importantly, non-volatile.
See here for more if you're interested:
https://excelxor.com/2016/02/16/criteria-with-statistical-functions-growth-linest-logest-trend/
Regards
**Array formulas are not entered in the same way as 'standard' formulas. Instead of pressing just ENTER, you first hold down CTRL and SHIFT, and only then press ENTER. If you've done it correctly, you'll notice Excel puts curly brackets {} around the formula (though do not attempt to manually insert these yourself).

Answer 2

XIRR requires two arrays of arguments -- values and dates (with an optional third "guess" argument). To try to stitch together those arrays from non-contiguous ranges of purchase dates, total returns, purchase amounts, and a number of "today's dates" would be quite a challenge for an Excel formula. Hence I provide a User Defined Function written in VBA.
The arguments for the function are the fund or script (sFund) and your data table range laid out as you have in your example above.
As suggested in one of your comments, I used TODAY as the date corresponding to the Total Return column. Easily changed if that is not the case.
Also, note that I did not use the "forXIRR" column, rather I just used the negative of the NetAmount column. If you delete the forXIRR column, you will need to change the reference to .TotalReturn
I created a custom Class in order to make things a bit more understandable.
After you insert the Class Module, you must rename it cFUND
Class Module
Option Explicit
'Rename cFUND
Private pFund As String
Private pPurchDt As Date
Private pPurchDts As Collection
Private pPurchAmt As Double
Private pPurchAmts As Collection
Private pTotalReturn As Double
Private pTotalReturns As Collection
Public Property Get Fund() As String
Fund = pFund
End Property
Public Property Let Fund(Value As String)
pFund = Value
End Property
Public Property Get PurchDt() As Date
PurchDt = pPurchDt
End Property
Public Property Let PurchDt(Value As Date)
pPurchDt = Value
End Property
Public Function ADDPurchDt(Value As Date)
pPurchDts.Add Value
End Function
Public Property Get PurchDts() As Collection
Set PurchDts = pPurchDts
End Property
Public Property Get PurchAmt() As Double
PurchAmt = pPurchAmt
End Property
Public Property Let PurchAmt(Value As Double)
pPurchAmt = Value
End Property
Public Function ADDPurchAmt(Value As Double)
pPurchAmts.Add Value
End Function
Public Property Get PurchAmts() As Collection
Set PurchAmts = pPurchAmts
End Property
Public Property Get TotalReturn() As Double
TotalReturn = pTotalReturn
End Property
Public Property Let TotalReturn(Value As Double)
pTotalReturn = Value
End Property
Public Function ADDTotalReturn(Value As Double)
pTotalReturns.Add Value
End Function
Public Property Get TotalReturns() As Collection
Set TotalReturns = pTotalReturns
End Property
Public Function CalcXIRR()
Dim v, d, w
Dim I As Long
With Me
ReDim d(.PurchDts.Count * 2 - 1)
ReDim v(UBound(d))
I = 0
For Each w In .PurchAmts
v(I) = w
I = I + 1
Next w
For Each w In .TotalReturns
v(I) = w
I = I + 1
Next w
I = 0
For Each w In .PurchDts
d(I) = w
I = I + 1
Next w
Do Until I > UBound(d)
d(I) = Date
I = I + 1
Loop
End With
CalcXIRR = WorksheetFunction.XIRR(v, d)
End Function
Private Sub Class_Initialize()
Set pPurchDts = New Collection
Set pPurchAmts = New Collection
Set pTotalReturns = New Collection
End Sub
Regular Module
Option Explicit
Function fundXIRR(sFund As String, rTable As Range) As Double
Dim vSrc As Variant
Dim cF As cFUND
Dim I As Long
vSrc = rTable
Set cF = New cFUND
For I = 2 To UBound(vSrc, 1)
If vSrc(I, 2) = sFund Then
With cF
.PurchDt = vSrc(I, 1)
.ADDPurchDt .PurchDt
.Fund = vSrc(I, 2)
.PurchAmt = -vSrc(I, 5)
.ADDPurchAmt .PurchAmt
.TotalReturn = vSrc(I, 7)
.ADDTotalReturn .TotalReturn
End With
End If
Next I
fundXIRR = cF.CalcXIRR
End Function
Given your data above, XIRR for B would be calculated as:
XIRR({-35000;-50000;43000;61500},{"1/8/2015";"1/14/2015";"8/29/2016";"8/29/2016"}
Here are the results for your data above:

Answer 3

I will assume based on your table that the date is column A, the fund (or "Script") is column B and the "ForXIRR" is column F. The below will do it for you:
{=XIRR(IF(B:B="A",F:F,0),IF(B:B="A",A:A,0))}
Make sure you enter this with Shift + Ctrl + Enter since it is an array formula.
Note: The above will calculate for "A", but substitute that part of the formula for any other fund, or use a cell reference to calculate for others.
EDIT:
I realized the above will only work for the first letter in the sequence, please use below, and again, adjust the "B" to whatever you need. This will work for any of the letters present. Also, adjust all the ranges to match your needs, I only did rows 1:10 for my test purposes. The below adjusts the start of the range so it is always the first value for whichever fund is input (ie "A", "B", "C") to allow this to calculate. Without this change, the above will always start with a zero unless it is the first in the list ("A" in the OPs example), and XIRR only calculates with a negative number as the first value.
=XIRR(IF(OFFSET($B$1:$B$10,MATCH("B",$B$1:$B$10,0)-1,0,ROWS($B$1:$B$10)-MATCH("B",$B$1:$B$10,0)+1,1)="B",OFFSET($F$1:$F$10,MATCH("B",$B$1:$B$10,0)-1,0,ROWS($B$1:$B$10)-MATCH("B",$B$1:$B$10,0)+1,1),0),IF(OFFSET($B$1:$B$10,MATCH("B",B1:B10,0)-1,0,ROWS($B$1:$B$10)-MATCH("B",$B$1:$B$10,0)+1,1)="B",OFFSET($A$1:$A$10,MATCH("B",$B$1:$B$10,0)-1,0,ROWS($B$1:$B$10)-MATCH("B",$B$1:$B$10,0)+1,1),0))