If I buy 10 shares of stock at $10 each I have spent $100 in stocks.
If I later sell these within the same year, do I pay taxes only on the difference of the buy price and the sell price [with a deduction for loss] or the entire amount?
If I buy $100 worth of stock, and then sell it later in the year at $110, do I pay capital gains of 15% on $10? Or do I pay 15% on the $110? (I make under $100k a year)