Can I buy stock before the market opens?

Related questions

1. How many trading days are there in 2019?
2. Is Presidents Day a federal holiday 2019?
3. Is Nasdaq open on weekends?
4. What's closed on Martin Luther King Day?
5. Do all stocks trade after hours?
6. Will the stock market be open tomorrow?
7. Should you buy stock after hours?
8. Why do stocks go up after hours?
9. Can you sell stock on Saturday?
10. How do stocks go up after hours?

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18. #depends