Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

Do I make money in the stock market from other people losing money?
Just because your slice of pie gets bigger doesn't necessarily mean someone else's becomes smaller. In a lot of cases it's the entire pie that gets bigger. Why is the pie bigger? More investors (savers turn investors; foreign investments, etc.), more money printed (QE anyone?), Market sentiment changes (stock is priced by perceptions) And it can certainly get smaller.