How Stock Investing Differs From Gambling

Written by the William Allan team · Published 2023-02-17T12:00:00.000Z

Over the past few decades, I’ve often heard stock-market investing compared with gambling. Both involve uncertainty and the possibility of losing money. But owning part of a business and placing a casino wager have different economic foundations.

With the Super Bowl just behind us, it is a useful time to consider what that comparison does—and does not—tell us.

A Casino’s Advantage

Casino games generally give the house an expected advantage under their rules. That advantage depends on the wager and its payout, not just the percentage of bets that win. A player can have a winning session even when the game’s expected return favors the casino.

In craps, taking or laying odds on eligible bets can pay true odds, but the required base wagers favor the house. There is no universal 50% chance of leaving a session with the money you arrived with. Session outcomes depend on the bets, stakes, and stopping decisions. The underlying craps probability calculations show why different wagers must be assessed separately.

What an Investor Owns

A shareholder owns an economic interest in a company. Business cash flows, future prospects, financing, and the price paid all matter to the investment’s value. That differs from a fixed casino payout schedule, but it does not eliminate uncertainty: companies can disappoint or fail, and shareholders can suffer permanent losses.

Historical data help frame that risk. For example, in Aswath Damodaran’s 1928–2022 US stock-return sample, 69 of the 95 calendar years were positive. The series includes dividends. That count describes one historical US sample before an individual investor’s costs and taxes; it is not a forecast or anyone’s personal chance of profit. Damodaran’s 2023 review places that experience in context.

Time Horizon Matters, but Is Not a Guarantee

A longer horizon may give an investor more flexibility to weather a decline. It does not assure a gain, and there is no universal five- or ten-year threshold that makes a stock allocation suitable.

Money needed soon generally warrants less volatility. An appropriate allocation depends on objectives, time horizon, other resources, and the ability to bear losses. Investor.gov’s allocation guidance explains those considerations.

Investing decisions also depend on valuation, diversification, costs, taxes, and behavior. Neither a favorable historical frequency nor a well-researched company removes the need for that analysis.

The reason to invest is to pursue an objective through an appropriate ownership and risk-taking plan. Comparing stocks with a casino can start a conversation, but fixed “odds of winning” cannot finish it.

This commentary is for informational purposes only and is not investment, tax, or legal advice. All investing involves risk, including the possible loss of principal, and past performance does not guarantee future results.