Generally, short-term (assets held less than one year) is taxed at your personal tax rate. Long-term (more than one year) is currently taxed at 15%, but will r

Generally, short-term (assets held less than one year) is taxed at your personal tax rate. Long-term (more than one year) is currently taxed at 15%, but will revert back to 20% beginning in 2011. [EDIT: based on US law]