Offer your thoughts or opinion on the input financial query or topic using your financial background.

Tax implications of diversification
Yes, to change which stocks you owe you need to sell one and buy the other, which for tax purposes means taking the profit or loss accrued up to then. On the other hand this establishes a new baseline, so you will not be double-faced on those gains. It just makes a mess of this year's tax return, and forced you to set aside some if the money to cover that.