Margin Requirements Upon Exercise
Chapters in this video
- 0:00 The option margin setup: buyer vs. writer while open
- 1:07 Why Trey the buyer posts zero margin
- 1:37 Why Hank the writer must post performance-bond margin
- 2:08 The lottery ticket analogy for buyer and writer risk
- 2:50 The crucial trap: buyer owes nothing before exercise
- 3:20 The instant flip at exercise: option becomes futures
- 4:14 Both parties now post futures margin with daily variation
- 5:14 Visual side-by-side: before and after exercise
- 6:02 Exam trap one: the buyer's switch
- 6:45 Exam trap two: the mutual obligation misconception
- 7:13 Final provocative question and rapid-fire recap
What this video covers
- Why the option buyer (holder) posts no margin while the option is open, and how the premium paid in full serves as the absolute maximum loss
- Why the option writer (grantor) must post performance-bond margin while the position is open, and why the premium collected does not satisfy this requirement
- The precise mechanical transformation at exercise: the option contract disappears and converts into a live futures position for both parties
- Why both the new long and the new short must post futures (performance-bond) margin after exercise, and what daily variation margin means in practice
- The buyer's switch as a deliberate exam trap: a former option buyer who owed zero margin now holds a margined futures position and can face margin calls
- The mutual obligation trap: why both sides post futures margin after exercise, not just the original writer
- How to apply the memory aid that an option buyer pays once (the premium) and owes nothing more, until they exercise
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