Problem:
A taxpayer bought 1,000 share of stock for investment for $30,000 on December 24, 2011. On December 30, 2011, he sold 400 share of the stock for $18,000. On January 20, 2012, he bought back the 400 shares for $20,000.
Required:
Question 1: What is his taxable gain or loss in 2011?
Question 2: What is his taxable gain or loss in 2012?
Note: Please show how to work it out.