Answer: 0
Explanation:
From the question, we are informed that a customer has an existing short margin account and wants to write five covered puts against 500 shares of stock that are short in the account.
Based on the above scenario, the margin requirement to write the puts will be zero. This is due to the fact that there is no risk that is attached to the short calls.
 
        
             
        
        
        
Answer:
a. Qx =9, Qy=9
Explanation:
As per the given data
Q = QX = QY
MRX = 150 - 6QX = 150 - 6Q
MRY = 30 - 4QY = 30 - 4Q
MC = 10Q
Now calculate the Marginal revenue as follow
MR = MRX + MRY 
MR = 150 - 6Q + 30 - 4Q 
MR = 150 + 30 - 6Q - 4Q 
MR = 180 - 10Q
The Equilibrium of the producer will be 
MR = MC
180 - 10Q = 10Q
180 = 10Q + 10Q
180 = 20Q
Q = 180 / 20
Q = 9
As we know
Q = Qx = QY
Hence, the value of Qx  and QY is 9
 
        
             
        
        
        
Answer:
P = 380
Explanation:
At equilibrium, we have:
Qs = Qd 
Since Qs = 1,050 and Qd = 2,000 – 2.5P, we therefore have:
1,050 = 2,000 – 2.5P
We now proceed to rearrange and solve for P as follows:
1,050 - 2000 + 2.5P = 0
2.5P = 2,000 - 1,050
2.5P = 950
P = 950 / 2.5 = 950 ÷ 2.5
P = 380
Therefore, the equilibrium price 'P' is equal to 380.