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Do I make money in the stock market from other people losing money?
The answer is partly and sometimes, but you cannot know when or how. Most clearly, you do not take somebody else's money if you buy shares in a start-up company. You are putting your money at risk in exchange for a share in the rewards. Later, if the company thrives, you can sell your shares for whatever somebody else will pay for your current share in the thriving company's earnings. Or, you lose your money, when the company fails. (Much of it has then ended up in the company's employees' pockets, much of the rest with the government as taxes that the company paid).  If the stockmarket did not exist, people would be far less willing to put their money into a new company, because selling shares would be far harder. This in turn would mean that fewer new things were tried out, and less progress would be made. Communists insist that central state planning would make better decisions than random people linked by a market. I suggest that the historical record proves otherwise. Historically, limited liability companies came first, then dividing them up into larger numbers of "bearer" shares, and finally creating markets where such shares were traded.  On the other hand if you trade in the short or medium term, you are betting that your opinion that XYZ shares are undervalued against other investors who think otherwise. But there again, you may be buying from a person who has some other reason for selling. Maybe he just needs some cash for a new car or his child's marriage, and will buy back into XYZ once he has earned some more money.  You can't tell who you are buying from, and the seller can only tell if his decision to sell was good with the benefit of a good few years of hindsight.  I bought shares hand over fist immediately after the Brexit vote. I was putting my money where my vote went, and I've now made a decent profit. I don't feel that I harmed the people who sold out in expectation of the UK economy cratering. They got the peace of mind of cash (which they might then reinvest in Euro stocks or gold or whatever). Time will tell whether my selling out of these purchases more recently was a good decision (short term, not my best, but a profit is a profit ...)  I never trade using borrowed money and I'm not sure whether city institutions should be allowed to do so (or more reasonably, to what extent this should be allowed). In a certain size and shortness of holding time, they cease to contribute to an orderly market and become a destabilizing force. This showed up in the financial crisis when certain banks were "too big to fail" and had to be bailed out at the taxpayer's expense. "Heads we win, tails you lose", rather than trading with us small guys as equals! Likewise it's hard to see any justification for high-frequency trading, where stocks are held for mere milliseconds, and the speed of light between the trader's and the market's computers is significant.