How do i calculate gain in my portfolio?

[JEDI]

Lets say i have $500k in my portfolio at the beginning of the year.
I usually calc my gain by (End of year $ - beginning of year $)/Beginning of year $

so if end of year my portfolio has $600k in it, then the gain is 20%.

but what if in Nov i add $200k more to my portfolio and it only appreciated $1k by end of year?

So the amount of $ i put in is now $700k, and at end of year the value is $801k. using my simple formula, the gain is 14.4%. But that looks wrong. The gain % should be higher?

How do i take into account the $200k i added in Nov, and it's $1k gain?
What's the formula?

 

[Engineer]

http://financial-education.com/2008/01/06/calculating-returns-in-a-portfolio/

 

[slayer202]

Scale: 1/1000 dollars

 

[Capt Caveman]

yajt

 

[Aharami]

give 600K to me and write it off on your taxes as a charitable donation

 

[KingstonU]

Is this really just a brag thread?

 

[jupiter57]

Try asking your 8th grade teacher when you return to school in August.