How do I invest in the VIX index?

Related questions

1. What is the difference between Vxx and VXXB?
2. Is Vxx an ETN?
3. What is the VIX fear index?
4. What is the inverse of VIX?
5. What is the highest the VIX has ever been?
6. What does the VIX indicate?
7. What does VIX mean?
8. What is S&P 500 VIX Short Term Futures Index?
9. What drives the VIX?
10. What is a good volatility for stock?

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7. #mimic
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13. #volatility
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16. #inverse
17. #funds