In plain language — Buying a stock means holding a fraction of a company's equity. It does not mean lending money to the company, and it guarantees neither dividends nor repayment of the price paid.
A stock is an instrument representing an ownership position (equity) in a company. A shareholder participates in the company's residual value: creditors and bondholders have contractually senior claims, while common shareholders are entitled to what remains.
The listed security is distinct from the company, even though it reflects rights and expectations concerning that company. Its market price may change because of corporate results, interest rates, economic conditions, liquidity, news or shifts in participants' expectations.
What a stock confers
Rights depend on the law, the company's governing documents and the share class. They may include:
- an economic interest in distributed profits;
- voting rights on certain corporate decisions;
- rights to information and documents provided by law;
- a residual interest in the assets upon liquidation;
- possible subscription or conversion rights.
Common stock normally includes voting rights and a residual interest. Preferred stock may have priority for dividends or liquidation, but reduced or no voting rights. Names and rights are not universal: they must be checked in the issuer's documents.
A dividend is not a bond coupon. The company may reduce, suspend or omit it depending on results, constraints and corporate decisions.
Primary and secondary markets
In the primary market, the company issues new shares and raises capital. In the secondary market, investors trade already-issued securities with one another; the company does not automatically receive the proceeds of every transaction.
Being listed means that a share class is admitted to trading on a venue under specified rules. A listing does not guarantee that the security is liquid, suitable for every investor or correctly valued.
Listed companies publish periodic reports and material disclosures according to their jurisdiction. In the United States, for example, public filings are available through EDGAR; other markets have different local registers and requirements.
Where returns may come from
For an unleveraged stock position, before costs and taxes:
total return ≈
(ending price − starting price + dividends per share) / starting price
Expressed as rates, this is approximately the sum of price return and dividend yield measured against the same starting capital. The formula is a decomposition, not a forecast. The price may fall, the dividend may change and the investor may lose the entire capital committed. Corporate actions such as stock splits, reverse splits, rights issues, mergers and spin-offs alter quantities or rights and must be considered when reconstructing prices and performance.
Stock, index, ETF and derivative
| Object | What you hold |
|---|---|
| Stock | ownership interest in a specific company |
| statistical measure; it cannot be bought directly | |
| share of a fund that holds or replicates a portfolio | |
| contractual right/obligation on the underlying | |
| contract with the provider on the price difference |
A screen displaying “Apple”, “Eni” or another company name may offer cash shares, fractional shares, CFDs, options or synthetic tokens. Only the account and instrument documents establish which right has been acquired.
Main risks
- Company risk — Revenue, costs, management, financing and competition may deteriorate.
- Market risk — Even a sound company may decline with the market or when interest rates are repriced.
- Residual risk — In insolvency, common shareholders rank behind creditors and may receive nothing.
- Dilution — New issues or convertible instruments may reduce the economic and voting interest.
- Liquidity — Spreads and market impact may increase; trading may be suspended.
- Currency — Trading currency, revenue currencies and account currency do not necessarily coincide.
- Concentration — The outcome of a single stock depends on one issuer; diversification reduces some specific risks, not market risk.
- Securities lending and leverage — Short selling and margin purchases add costs, collateral requirements and losses potentially greater than the capital initially deposited.
What to check
- company, share class, ISIN or another identifier;
- voting rights, dividend rights and the class's priority;
- execution venue, currency, trading hours and settlement method;
- financial statements, disclosures and risks reported by the issuer;
- number of shares, possible dilution and corporate actions;
- volume, spread and depth available in the actual market;
- commissions, custody, foreign exchange, taxes and any margin-financing cost;
- the difference between owning the stock and replicating it through a derivative.
Common mistake — Confusing an “excellent company” with an “attractively priced stock”. Business quality, the security's rights, the price paid and the investment horizon are different questions.
Sources
- U.S. Securities and Exchange Commission, Investor.gov, Stocks — FAQs.
- U.S. Securities and Exchange Commission, Investor.gov, Stock — ownership, proportional claim and voting rights.
- Banca d'Italia, L'economia per tutti, Azioni.
- U.S. Securities and Exchange Commission, EDGAR — Search and Access — official archive of U.S. corporate filings.