Answer:
The customer's cost basis in DEF stock is:
$4,900
Step-by-step explanation:
The stock price = $49 per share
Number of shares = 100
The value on June 12 = $4,900 ($49 x 199)
The DEF stock cost basis is the amount which is initially paid for the purchase of the 100. When the DEF stock is sold, the tax liability is determined by how much is spent to buy the security (cost basis) and the sales price. Since the security is sold at a price lower than the original purchase price, the difference is not taxable as a capital gain.