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Geometric Return on Share Prices over 20 Year Time Period

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Geometric Return On Share Prices Over 20 Year Time Period

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Confused Hi I am trying to work out the geometric return on 20 years worth of share prices for IPO's.  However i can not work out which part of my formular is not working as I go from $100M to many gazillions $$$ at the end with an annualise geometric return of lots. 

So i have set this up with
Spreadsheet 1:with my share prices coming in and out as they list and delist over the time period.
Spreadsheet 2: calcuates the market cap on a daily basis of the active shares (so if a share is listed on a day then the market cap is included in that day total market cap).
Spreadsheet 3: works out the weighting/rebalancing of the portfolio as shares list and delist.  So Total amount invested x (Market cap of the share at IPO list date/Total market cap onthat day) / share price.
Spreadsheet 4: Share price x weighting on that day 

Geometric return is 252 (trading days) x log (end value of the investment/begining value of investment (i.e. $100M)/ 5040 days to get an annualised return

I can not see how a $100M increases to this large total value of investmetn at the end of 2019.  Can someone please check to see if this makes sence for them as well?  I am happy to send the spreadsheet but cant find how to attach it here?



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Confused
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You can send the file as a reply to the forum notification email and we can take a look.
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Confused Yes thank you i did do a daily return schedule but the cumlative increase seems too much and so i was hoping someone might be able to check the logic or if it is a forumla error, but hoping someone might be able to? It increases so much it does not seem correct - if anyone is able to quickly check it for me???  would be much appreciated?
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Confused
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I would create a daily return schedule table so you can see the progression of total investment return.
The first calculation should be the daily return then you can cumulate it in a separate column if ability to redeem and reinvest (delist/list), otherwise it would be a simple additive return from one day to the next.

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