Final answer:
The margin in the account now is approximately 73.7%.
Step-by-step explanation:
The margin in the account can be calculated using the formula:
Margin = (Total Value of Short Sale - Current Value of Shares) / Total Value of Short Sale
Given that the initial margin requirement is 40%, the total value of the short sale is determined by multiplying the number of shares (1863) by the initial selling price ($13 per share). The current value of the shares can be calculated by multiplying the number of shares (1863) by the current price ($55 per share). Substituting these values into the formula:
Margin = (1863 * $13 - 1863 * $55) / (1863 * $13)
After evaluating the expression, the margin in the account now is approximately 73.7%.