Why did the financial crisis of 2008 happen?

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Tags

1. #mortgages
2. #support
3. #demanded
4. #great
5. #permitted
6. #hedge
7. #these
8. #recession
9. #caused
10. #crisis
11. #trading
12. #banks
13. #engage
14. #created
15. #primarily
16. #financial
17. #profitable
18. #deregulation
19. #industry
20. #derivatives