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Stock formula question

Posted on 7/8/10 at 11:38 pm
Posted by Feed Me Popeyes
Baltimore, MD
Member since Apr 2008
2104 posts
Posted on 7/8/10 at 11:38 pm
I am trying to figure out a formula for knowing when to sell a position after I have reached a particular percentage gain, taking transaction costs and capital gains taxes into account...but so far I have been unsuccessful (and google hasn't helped). I was hoping the MB could rescue me

A simple example:
Say I paid $25/share for 10 shares of XYZ. It cost me $5 to buy and will cost me $5 to sell. My capital gains tax bracket is 25%.

At what price will I be able to sell and realize a 10% gain free and clear? Is there a popular formula for this? If the answer is "it depends," I would even appreciate something to get me close to the right answer

Thanks
Posted by LSUtoOmaha
Nashville
Member since Apr 2004
26575 posts
Posted on 7/9/10 at 12:20 am to
10%= (sold price-purchase price-10)*.75

Posted by Doc Fenton
New York, NY
Member since Feb 2007
52698 posts
Posted on 7/9/10 at 12:21 am to
quote:

My capital gains tax bracket is 25%.


Sounds like a homework problem.

You bought $250 worth of stock, and want a $25 gain free and clear.

1 / (1 - .25) = 4/3

So you need $33.33 (= $25 x 4/3) in taxable CG to end up with a post-tax profit of $25.

Add in the $10 in fees and I think you need to sell at $293.33 = $29.33 per share--so a 17.3% rise in the market price is necessary for you to clear 10%.
Posted by Doc Fenton
New York, NY
Member since Feb 2007
52698 posts
Posted on 7/9/10 at 12:26 am to
quote:

10%=


Correct if you mean... "purchase price*.10 ="
Posted by Feed Me Popeyes
Baltimore, MD
Member since Apr 2008
2104 posts
Posted on 7/9/10 at 6:10 am to
thanks guys...I was struggling with that for too long. My brain is mush when I get home from work
Posted by BRTiger2005
Member since May 2005
1270 posts
Posted on 7/9/10 at 6:28 pm to
i don't think you should be buying stock if you can't figure this out.
Posted by Feed Me Popeyes
Baltimore, MD
Member since Apr 2008
2104 posts
Posted on 7/9/10 at 6:33 pm to
shut the hell up
Posted by The Easter Bunny
Minnesota
Member since Jan 2005
45566 posts
Posted on 7/9/10 at 6:49 pm to
quote:

shut the hell up


Posted by tirebiter
7K R&G chile land aka SF
Member since Oct 2006
9181 posts
Posted on 7/10/10 at 9:32 am to
quote:

i don't think you should be buying stock if you can't figure this out.


He'll be calculating massive "gains" just like the Beardstown Ladies did and eventually find he was losing money the entire time after someone shows him the correct math.
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