I've been doing some research and here are the questions I've had-

1.Do the 30 Dow Jones Industrial companies change?

2.When you buy and sell stocks does it make a difference if you do it through the New York Stock Exchange or the NAZDAQ?

3.What is insider trading?

4.Is stock cheaper/more expensive in the bear or bull markets?

5.Does money accumulate and get taken away as the company rises or falls? Or do you sell your stock before you think it will start to fall? (Or both)

6.What is the 10% historical market average? I couldn't find any explanation that made sense.

7. How long does it take for an average stock to pay for itself?

8.Should you buy during bear or bull, or is it just preference?

Thanks! I hope they all made sense! If not tell me and I'll try to rephrase it.