Let's say your broker shows the following:
Transaction Value of Shares Bought: $1m
Transaction Value of Shares Sold: $850k
Shares Held - $150k
(Excluding factors like brokerage, tax, dividends etc... This is more a maths question)
If you sold those Shares for $150k, does that definately (mathetmatically) mean you finish with the same amount as you started with?