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

Tax on Stocks or ETF's
I think the answer you are looking for is:  You are not taxed on the original basis (purchase cost) of your investment.  If you pay $30 a share, and sell at $35, the $5 per share gain is taxable at time of sale.  But the $30 basis cost doesn't enter into tax calculations at all.  (So it's important to keep good records on your investments and how much you paid for them at purchase.)