Why investing isn’t gambling
The main difference is where the money comes from. In a casino, the house wins on average and players lose, so the total is less than what went in. Shares are different, because companies make profits and pay some of them out. That’s why the S&P 500 has returned about 10% a year on average since 1928, including dividends, and why the longer you hold a broad index fund, the less likely you are to lose money.
The law has seen it this way for more than a century. In 1905 the US Supreme Court upheld trading on the Chicago Board of Trade, with Justice Holmes describing well-informed speculation as “the self-adjustment of society to the probable”. Today shares are regulated as securities by the SEC in the US and the FCA in the UK, not as bets.
When it starts to look like a bet
The comparison isn’t completely unfair. Over a single day, the market is close to a coin flip. Between 1951 and 2025 the S&P 500 rose on 53.7% of trading days and fell on the rest. Picking single stocks is riskier than most people think too. A study of every US stock since 1926 found that more than half did worse over their lifetime than short-term government bonds, and about 4% of companies created all the net gains.
People feel the overlap as well. In a 2021 survey for the FCA, 68% of young investors holding high-risk investments said investing felt like gambling.
What it means for you
Buying a spread of shares, such as an index fund, and holding for years isn’t gambling. Buying a handful of hyped stocks to sell next week is much closer to it. If you’re checking prices every hour and chasing losses, you’re treating the stock market like a casino, and the asset doesn’t matter anymore.
Questions people also ask
What is the average stock market return?
The S&P 500 has returned about 10% a year on average since 1928, including reinvested dividends, before inflation.
Can you lose all your money in stocks?
In a single company, yes. Most individual US stocks since 1926 did worse than short-term government bonds. Spreading your money across many companies, for example in an index fund, makes that far less likely.
Is day trading gambling?
Legally no, but the results look a lot like it. Fewer than 1% of day traders in a 15-year Taiwanese study made money reliably.
Sources
- Damodaran, Historical returns on stocks, bonds and bills (NYU Stern)
- Crestmont Research, Stock market yo-yo (daily up and down days, 1951 to 2025)
- Bessembinder (2018), Do Stocks Outperform Treasury Bills?, Journal of Financial Economics
- Board of Trade v. Christie Grain and Stock Co., 198 U.S. 236 (1905)
- FCA, young investors driven by competition and hype (2021)