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Thread: AutoTracker Issue

  1. #1

    Join Date
    Jan 2011
    Location
    Okinawa, Japan
    Posts
    1,458

    Default AutoTracker Issue

    Just noticed - yesterday my return for the year had me at 9.25%. I'm 100% S, which means I lost 2.16% on the day. That should have me at 7.09% for the year, but today the AT shows me at 6.88%. That's a loss of 2.37% on the day. Anybody else seeing funny math with their returns today?


  2.  
  3. #2

    Default Re: AutoTracker Issue

    To get a total return, you wouldn't add or subtract the daily returns.

    For example: If you had a $100,000 account, and you made 100% one day and lost 50% the next, you wouldn't have gained 50%, but instead you would be at 0%. You would have $200,000 after day 1 (+100%) and then you would have $100,0000 after day 2 (-50%).

    Here is the actual math our spreadsheets use... (100*(1+(old total %))*(1+(new daily %))-100)/100

    I hope this helps. If not, let me know.
    Tom
    Market Commentary | My Blog | TSP Talk Plus | |

    I am not a Registered Investment Advisor and this is not investment advice. Please do your own due diligence.

  4.  
  5. #3

    Join Date
    Jan 2011
    Location
    Okinawa, Japan
    Posts
    1,458

    Default Re: AutoTracker Issue

    Oh man. Flashbacks to high school math class. Thanks - I'll try to wrap my head around that later.

  6.  
  7. #4

    Default Re: AutoTracker Issue

    You don't teach math?

  8.  

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