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How can I calculate total return of stock with partial sale?
You have only sold 200 shares for $4.75 from those bought for $3.15. So your profit on those 200 shares is $1.60 per share or $320 or 51%. From that you have 110 shares left that cost you $3.15 and 277 shares that cost you $3.54. So the total cost of your remaining shares is $1,327.08 (110 x $3.15 + 277 x $3.54). So your remaining shares have a average cost of $3.429 per share ($1,327.08/387). We don't know what the current share price is as you haven't provided it, nor do we know what the company is, so lets say that the current price is $5 (or that you sell the remaining 387 shares for $5 per share). Then the profit on these 387 shares would be $1.571 per share or $607.92 or 46%. Your total profit would then be $320 + $ 607.92 = $927.92 or 47% (note that this profit neglects any brokerage or other fees, as you have not provided any). Edit due to new info. provided in question With the current share price at $6.06 then the profit on these 387 shares would be $2.631 per share or $1018.20 or 77%. Your total profit would then be $320 + $1018.20 = $1338.20 or 75% (note that this profit neglects any brokerage or other fees, as you have not provided any).