What does 30 margin requirement mean?

Related questions

1. How much can I borrow on margin?
2. Is selling Bitcoin legal?
3. How margin is calculated in trading?
4. What is short margin?
5. How do you pay back a margin loan?
6. Can you buy stocks on margin?
7. What is initial margin and maintenance margin?
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9. What triggers a margin call?
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Tags

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2. #higher
3. #certain
4. #board
5. #according
6. #reserve
7. #maintenance
8. #securities
9. #requirement
10. #federal
11. #initial
12. #might
13. #requirements
14. #stocks
15. #margin
16. #apply
17. #while