Capital Gains and Losses
What's a capital asset, and how much do I have to pay?
What is a capital gain?
  Capital Gain Tax Rate - A capital gain is what the tax law  calls the profit when you sell a capital asset, which is property such as  stocks, bonds, mutual fund shares, and real estate.
What's the difference between a  short-term gain and a long-term gain?
A very big difference. The law  divides investment profits into different classes determined by the calendar.  Short-term gains come from the sale of property owned one year or less;  long-term gains come from the sale of property held more than one year.
What is the holding period?
  Surprisingly enough, that's the  period you hold the property before you sell it. When figuring the holding  period, the day you buy property does not count, but the day you sell it does.  So, if you bought a stock on April 16, 2006, your holding period began on April  17. Thus, April 16, 2007, would mark the end of the first year. If you sold on  that day, you would have a short-term gain or loss. A sale on April 17 would  produce long-term results, though, since you would have held the asset for more  than one year.
  How much do I have to pay?
  The tax rate you pay depends a  great deal on whether your gain is short-term or long-term.
What is a capital loss?
  A capital loss is a loss on the  sale of a capital asset such as a stock, bond, mutual fund or real estate. As  with capital gains, capital losses are divided by the calendar into short- and  long-term losses.
Can I deduct my capital losses?
  Losses on your investments are  first used to offset capital gains of the same type. So, short-term losses are  first deducted against short-term gains and long-term losses are deducted  against long-term gains. Net losses of either type can then be deducted against  the other kind of gain. So, for example, if you have $2,000 of short-term loss  and only $1,000 of short-term gain, the extra $1,000 of loss can be deducted  against long-term gain. If short- and long-term losses exceed all of your  capital gains for the year, up to $3,000 of the excess loss can be deducted  against other kinds of income, including your salary, for example, and interest  income.
For more information, see IRS articles Reporting Capital Gains and Losses and Ordinary or Capital Gain or Loss.