Answer
6000 (representing a decrease in the OET account)
Step-by-step explanation:
The initial margin was $40 x 1000 x 0.50 = $20,000
As a result of the $10 increase in the stock price, the Old Economy Trader loses $10 x 1000 shares = $10,000
Now, considering the fact that an interest margin of %8 was paid on the load, we therefore arrive at:
$4 (representing %8 of $50) x 1000 = $4000
Old Economy Trader return on equity will now therefore be:
20000 - 10000 - 4000
= 6000 (representing a decrease in the OET account.)
For further clarity, we try break it down further
To sell the shares, the OET had to pay 50% of their market value and
thus the value of total assets in OET’s account is initially $40, 000 + $20, 000 = $60, 000. At the time of the sale, total liabilities are $40,000 and thus OET’s margin is initially $60, 000 − $40, 000 = $20, 000.