An investor takes a long position in one December gold futures contract on June 5 with the following terms:

• contract size is 100 oz
• futures price is US$1,250/oz
• initial margin requirement is US$6,000/contract
• maintenance margin is US$4,500/contract

How much is the threshold futures price to trigger the margin call to this investor?

Select one:

a. $1200/oz

b. $1300/oz

c. $1400/oz

d. $1100/oz

e. $1000/oz