If you’ve ever wondered what it actually means to “own a share” in a company — or how that ownership translates into real money in your pocket — this guide is for you.
Shares are the foundational instrument of stock market investing. They predate the modern financial system by centuries. Yet for millions of people, the mechanics of how shares work, how they’re valued, and how they generate wealth remain unclear. That gap in understanding has real consequences — it leads people to invest without a framework, react emotionally to normal market events, or avoid investing altogether.
This article covers everything you need to understand shares deeply: what they are legally and economically, how markets price them, the multiple ways they generate returns, and how to think about them as part of a broader investment strategy.
What Is a Share, Exactly?
A share (also called a stock or equity) represents a unit of ownership in a company. When a business wants to raise capital to grow, it can divide itself into millions (or billions) of ownership units and sell those units to the public. Each unit is a share.
When you buy a share in a company, you become a shareholder — a part-owner of that business. Your ownership is proportional to the number of shares you hold relative to the total number outstanding.
If a company has issued 10 million shares and you own 100,000 of them, you own 1% of the company. In theory, you are entitled to 1% of its profits, 1% of its assets (after liabilities) if it were liquidated, and 1 vote per share on major corporate decisions.
The Legal Status of Shareholders
Shareholders occupy a specific legal position. You are not a creditor — you don’t have a fixed claim on the company’s cash flows the way a bondholder does. You are an owner, but your claims come last in the legal “priority stack.”
This ordering matters in the event of company failure:
- Secured creditors (banks with collateral) get paid first
- Unsecured creditors (suppliers, trade creditors) get paid next
- Bondholders receive any remaining assets
- Preferred shareholders receive their allocation
- Common (ordinary) shareholders receive whatever remains
In liquidation, common shareholders often receive nothing. This is the price of potentially unlimited upside — shareholders benefit fully from a company’s growth, but bear the residual risk if it fails.
Types of Shares
Not all shares are equal. Understanding the main types helps you make more informed decisions.
Ordinary Shares (Common Stock)
The most common form. Holders have:
- Voting rights on major corporate decisions (board elections, mergers, major policy changes)
- Entitlement to dividends declared by the board (but not guaranteed)
- Residual claim on assets upon liquidation
The overwhelming majority of shares you encounter on stock exchanges are ordinary shares.
Preference Shares (Preferred Stock)
A hybrid between ordinary shares and bonds. Preferred shareholders:
- Receive fixed dividends before ordinary shareholders
- Have a priority claim on assets in liquidation above ordinary shareholders
- Typically do not have voting rights
They’re valued more for their income characteristics than growth potential. Insurance companies, pension funds, and income-oriented investors often hold preference shares.
Growth Shares vs Value Shares
While not a formal classification, this distinction is critical in practice:
Growth shares are in companies expected to grow earnings significantly faster than the broader market. They typically trade at high valuations relative to current earnings (high price-to-earnings ratios). Investors pay a premium for expected future growth. Technology companies are the archetypal growth shares.
Value shares are companies trading at low valuations relative to earnings, assets, or cash flow. They may be in unfashionable sectors, facing temporary difficulties, or simply overlooked by the market. Value investors seek these shares believing the market has underpriced them.
How Companies Issue Shares
Initial Public Offering (IPO)
When a private company decides to “go public,” it sells shares to the public for the first time through an Initial Public Offering. Investment banks manage the process — setting the initial price, finding institutional buyers, and listing the shares on a stock exchange.
The IPO price is determined through a process called book building, where institutional investors indicate what they’re willing to pay for a given number of shares. This process reveals demand and helps set a fair market price.
Secondary Offerings and Rights Issues
After the IPO, companies can issue additional shares to raise more capital. They may do this through:
- Secondary offerings: New shares sold to institutional investors or the public
- Rights issues: New shares offered to existing shareholders at a discount
Rights issues are a particularly important mechanism that existing investors need to understand — when a rights issue is announced, shareholders face a choice that has direct financial consequences. We cover this in full detail in our article on what are dividends vs splits vs rights issues.
How Share Prices Are Determined
The price of a share at any moment reflects the collective opinion of all buyers and sellers in the market about what the company is worth today — incorporating expectations about future performance.
Share prices are not set by the company. After the IPO, the market sets the price through continuous buying and selling. When more people want to buy than sell, the price rises. When more want to sell than buy, the price falls.
Fundamental Value vs Market Price
The theoretical approach to valuing a share is to estimate its intrinsic value — the present value of all future cash flows the company will generate, discounted back to today using an appropriate interest rate.
This is the basis of fundamental analysis — examining financial statements, business models, competitive advantages, management quality, and economic conditions to estimate what a company is genuinely worth.
If the market price is below your estimate of intrinsic value, the share is potentially undervalued — a buying opportunity. If the price exceeds intrinsic value, the share is potentially overvalued.
Key fundamental metrics include:
Price-to-Earnings (P/E) Ratio: Share price ÷ Earnings per share. A P/E of 20 means investors are paying £20 for every £1 of current annual earnings. High P/E stocks price in expected growth.
Price-to-Book (P/B) Ratio: Share price ÷ Book value per share. Compares market price to accounting value of net assets. Below 1.0 might indicate undervaluation; well above 1.0 reflects premium for profitability or brand.
Earnings Per Share (EPS): Company’s net profit ÷ total shares outstanding. Shows how much profit each share generates.
Dividend Yield: Annual dividend ÷ Share price × 100. Important for income investors.
Market Sentiment and Technical Factors
Beyond fundamentals, prices are also driven by:
- Investor sentiment: Fear and greed cycles affect valuations irrationally in the short term
- Macroeconomic conditions: Interest rates, inflation, GDP growth
- Geopolitical events: Conflict, sanctions, trade disputes — events that can move entire markets as seen in recent global stock futures movements
- Sector rotation: Money flowing between sectors as economic conditions change
- Technical factors: Chart patterns, trading volumes, momentum signals
Technical analysis studies price charts and trading data to identify patterns and trends. To understand the tools used by technical traders, our guide on technical analysis vs fundamental analysis covers the two approaches and when each is most useful.
The Two Primary Ways Shares Generate Returns
This is the central question for any investor: how does owning a share actually make you money?
There are two primary mechanisms, and understanding both is essential.
1. Capital Appreciation (Price Growth)
The most obvious way. You buy a share at £10 and sell it at £15 — a £5 capital gain per share. This return is driven by the company’s growing profits, improving prospects, or simply rising market sentiment.
Capital appreciation compounds over time. A company that grows its earnings by 10% annually will — all else equal — see its share price grow at a similar rate. Over 20 years, £10,000 invested in such a company grows to approximately £67,000 before inflation.
The challenge with capital appreciation is that it’s not guaranteed, and markets can be irrational in the short term. A company can be fundamentally excellent but see its share price fall for months due to market sentiment, sector rotation, or macroeconomic fear. Patience is non-negotiable for capital appreciation to compound effectively.
2. Dividend Income
Many established companies distribute a portion of their profits to shareholders as dividends. These are cash payments made periodically — typically quarterly or annually — in proportion to your shareholding.
Dividends provide income without requiring you to sell your shares. This makes them particularly valuable for income investors — retirees, for instance, who want their portfolio to generate living expenses.
The compounding power of dividends should not be underestimated. Historical data shows that approximately 40-50% of the total long-term return from equity markets has come from dividends reinvested over time — not from price appreciation alone.
When dividends are reinvested to buy additional shares, which in turn generate more dividends, which buy still more shares — the compounding effect becomes extraordinarily powerful over decades.
A useful strategy that amplifies dividend reinvestment is dollar-cost averaging — investing a fixed amount regularly regardless of market conditions, so you automatically buy more shares when prices are low and fewer when prices are high.
Total Shareholder Return (TSR)
Total Shareholder Return combines both return mechanisms:
TSR = (Ending Price − Starting Price + Dividends Received) ÷ Starting Price × 100
For example: You buy a share at £20. One year later it trades at £22. During the year, you received £0.60 in dividends.
TSR = (£22 − £20 + £0.60) ÷ £20 × 100 = 13%
TSR is the most comprehensive measure of a share’s return to investors. When comparing investments, always use TSR — a “no dividend” growth stock may show impressive price appreciation, but a dividend-paying value stock’s TSR may be equally strong once income is included.
Risk Factors Specific to Shares
Shares carry several distinct risk types that investors must understand and manage:
Business Risk
The company itself may fail, underperform, or face disruption. Management mistakes, competitive threats, product failures, and regulatory changes can all destroy value. Business risk is the most fundamental risk of equity investing.
Market Risk (Systematic Risk)
Even a fundamentally excellent company can see its shares fall in a broad market downturn. Market risk cannot be diversified away through stock selection — it’s the irreducible risk of participating in financial markets.
Liquidity Risk
In normal markets for large-cap stocks, liquidity (the ability to buy or sell quickly at fair prices) is not an issue. For small-cap or thinly-traded stocks, selling quickly at a fair price may be difficult, especially during market stress.
Concentration Risk
Holding too few stocks — or too many in the same sector or geography — exposes you to large losses if any single holding deteriorates. Proper asset allocation and diversification is the primary tool for managing this risk.
Currency Risk
Holding shares in foreign-listed companies or in funds that invest globally exposes you to exchange rate movements. A strong pound reduces the sterling value of US or European holdings even if their local-currency price is unchanged.
How to Measure Whether Your Shares Are Performing Well
Beyond simple price change and TSR, investors use several metrics to assess share performance:
Comparing to a Benchmark
Always compare your returns to an appropriate benchmark — a market index like the FTSE 100, S&P 500, or a sector-specific index. Generating 10% when the market returned 15% is actually underperformance. Generating 8% when the market returned 3% is strong outperformance.
Alpha and Beta
Alpha measures how much your share (or portfolio) outperformed or underperformed its expected return given its level of market risk. Positive alpha means skill or luck; negative alpha means you’d have been better off with an index fund.
Beta measures sensitivity to market movements. A share with a beta of 1.5 rises and falls 50% more than the market. Defensive stocks like utilities often have betas below 1.
Understanding these measures deeply is valuable for any investor. Our dedicated guides on what is alpha in investing and what is beta and how it measures risk explain both concepts with practical examples.
Sharpe Ratio
Measures return per unit of risk taken. A higher Sharpe Ratio indicates better risk-adjusted performance. Two portfolios with the same total return but different volatility have different Sharpe Ratios — the less volatile one is objectively better.
How Corporate Actions Affect Your Shares
During your holding period, the company may take actions that directly affect your shares:
Dividend payments generate income but reduce the company’s cash and typically cause the share price to fall by the dividend amount on the ex-dividend date.
Stock splits increase the number of shares you hold while proportionally reducing the price per share — no change in total value.
Rights issues offer you new shares at a discount but require a decision: subscribe, sell your rights, or accept dilution.
Stock buybacks reduce the total shares outstanding, increasing your ownership percentage and (usually) supporting the share price. Learn more in our guide on what is a stock buyback and why companies do it.
How Stock Exchanges Work: The Infrastructure Behind Share Trading
Understanding shares fully requires understanding the infrastructure that makes trading them possible.
Primary vs Secondary Markets
The primary market is where new securities are created and sold for the first time — IPOs, rights issues, and follow-on offerings occur here. Capital raised goes directly to the company (or selling shareholders).
The secondary market is where investors trade existing shares between themselves. The London Stock Exchange (LSE), New York Stock Exchange (NYSE), NASDAQ, and other global exchanges are all secondary markets. When you buy shares on your broker’s platform, you’re buying from another investor — not from the company itself. The company receives no proceeds from secondary market trading.
How Share Prices Move in Real Time
During trading hours, share prices change continuously based on order flow. The price at any moment reflects the best bid (highest price any buyer is willing to pay) and the best ask (lowest price any seller will accept).
The gap between these two — the bid-ask spread — represents a transaction cost. Large, liquid companies like BP or Apple have tiny spreads (fractions of a penny per share). Small-cap or thinly-traded stocks may have spreads of several percent, making them more expensive to trade.
Market makers (professional traders) provide liquidity by continuously quoting both bid and ask prices, ready to buy or sell at stated prices. They profit from the spread and take the risk of holding inventory.
Market Orders vs Limit Orders
When you place a trade, understanding order types prevents costly mistakes:
A market order buys or sells immediately at the best available price. It guarantees execution but not the price — in fast-moving or thinly traded markets, you may receive a significantly different price than expected.
A limit order specifies the maximum price you’ll pay (buy limit) or minimum price you’ll accept (sell limit). It guarantees the price but not execution — if the market never reaches your limit, the order goes unfilled.
For most retail investors, limit orders are preferable for less liquid stocks or when market conditions are volatile. Understanding these order mechanics connects directly to how stop-loss and take-profit orders work — both are forms of limit orders with specific triggering conditions.
Analysing Individual Shares: A Practical Framework
Moving from understanding shares in principle to selecting specific shares requires analytical framework. Here’s how professional investors approach equity analysis:
Step 1: Business Model Analysis
Before looking at any numbers, understand what the company actually does and how it makes money. Ask:
- What product or service does it sell?
- Who are its customers? Are they individuals, businesses, governments?
- What is its pricing power? Can it raise prices without losing customers?
- What are its switching costs? How hard is it for customers to leave?
- Is the market it serves growing, stable, or shrinking?
Companies with strong competitive moats — durable advantages that prevent competitors from eroding their market position — tend to generate superior returns over time. Moats include brand loyalty, network effects, cost advantages, regulatory licences, and proprietary technology.
Step 2: Financial Statement Analysis
Three statements provide the raw material for valuation:
Income Statement: Revenue, gross margin, operating costs, interest expense, and net profit. Key metrics: revenue growth rate, gross margin trend, operating leverage, net profit margin.
Balance Sheet: Assets (what the company owns), liabilities (what it owes), and equity (the residual belonging to shareholders). Key metrics: debt-to-equity ratio, cash position, working capital, return on equity.
Cash Flow Statement: Operating cash flow (cash generated by the business), investing cash flow (capital expenditure), financing cash flow (debt repayment, dividends, buybacks). Key metric: free cash flow (operating cash flow minus capital expenditure). A company that generates strong, growing free cash flow can self-fund growth, pay dividends, and buy back shares.
Step 3: Valuation
Several valuation methods are commonly used:
Discounted Cash Flow (DCF): Project future free cash flows and discount them to present value using the company’s cost of capital. Theoretically most rigorous, but highly sensitive to assumptions about growth rates and discount rates.
Price-to-Earnings (P/E) Comparison: Compare the company’s P/E ratio to its own historical average, to sector peers, and to the broader market. A company trading at a 30% discount to peers for no fundamental reason may be undervalued.
Enterprise Value/EBITDA (EV/EBITDA): Enterprise value (market cap plus net debt) divided by earnings before interest, tax, depreciation, and amortisation. More useful than P/E for comparing companies with different capital structures or tax situations.
Price-to-Free Cash Flow: Arguably more reliable than P/E since free cash flow is harder to manipulate than earnings.
Valuation is more art than science — the goal is not to calculate a precise intrinsic value but to form a judgment about whether the market is significantly underpricing or overpricing the company relative to its likely future performance.
The Role of Indices and Benchmarks
When discussing share returns, the conversation inevitably involves indices — statistical measures tracking the performance of a defined set of shares.
Major Share Indices
FTSE 100: The 100 largest UK-listed companies by market capitalisation. Companies include household names across banking, energy, consumer goods, mining, and healthcare.
FTSE 250: The next 250 largest UK companies after the FTSE 100. More domestically focused and generally considered a better barometer of UK economic health.
S&P 500: The 500 largest US-listed companies by market cap. The most widely followed equity index globally.
NASDAQ Composite: All stocks listed on the NASDAQ exchange, heavily weighted towards technology.
MSCI World: Covers approximately 1,500 large and mid-cap companies across 23 developed markets. Used as the standard benchmark for global equity portfolios.
MSCI Emerging Markets: Covers large and mid-cap stocks across 24 emerging market countries.
Why Indices Matter for Investors
Benchmarking: Your portfolio’s performance should always be measured against an appropriate benchmark. Generating 10% when your benchmark returned 15% is underperformance — even though 10% sounds impressive in isolation.
Passive investing: Index funds and ETFs that track indices allow you to own a diversified slice of the market at minimal cost. The evidence strongly supports passive investing for most retail investors — the vast majority of actively managed funds fail to outperform their benchmark index over 10+ year periods after fees.
Index inclusion/exclusion effects: When a company is added to a major index, passive funds are required to buy it, creating demand. Conversely, removal from an index triggers forced selling. Index rebalancing events can cause significant short-term price movements.
Understanding Short Selling: The Other Side of Share Ownership
Most investors only think about buying shares and profiting from price rises. But markets also allow traders to profit from falling prices through short selling.
A short seller borrows shares from a broker, sells them at the current market price, waits for the price to fall, buys them back at the lower price, returns them to the lender, and pockets the difference.
Short selling is high-risk: your maximum gain is 100% (if the share price falls to zero) but your maximum loss is theoretically unlimited (prices can rise indefinitely). Short sellers also pay borrowing fees and must cover any dividends paid while they’re short.
Despite its reputation, short selling performs an important market function — short sellers are often the first to identify accounting fraud, business model problems, or valuation excess, and their selling activity contributes to price discovery. Understanding what is short selling and how it works gives you a fuller picture of market dynamics.
Hedging Your Share Portfolio Against Downside Risk
Once you own shares, you may want to protect against significant downside during periods of uncertainty — without selling your holdings and potentially triggering tax events.
Portfolio hedging strategies allow you to maintain your equity exposure while reducing downside risk:
Put options: Buying the right to sell shares at a specified price provides insurance against price falls. If you own 1,000 shares in a company at £5, buying put options with a £4 strike price caps your downside at £1 per share. The cost is the option premium.
Inverse ETFs: These instruments rise in value when the underlying index falls. Holding a small allocation to an inverse FTSE 100 ETF partially offsets portfolio losses during market downturns.
Gold allocation: As discussed, gold has historically provided partial portfolio protection during equity sell-offs.
Reducing leverage: If you use margin or leverage in your portfolio, reducing it during uncertain periods reduces both potential gains and potential losses.
Understanding what is hedging and how traders use it provides a comprehensive overview of these protective strategies.
Leverage in Share Investing: Amplifying Returns and Risks
Some investors use leverage — borrowed money — to amplify their exposure to shares beyond their actual capital.
If you invest £10,000 of your own money and borrow an additional £10,000 to invest £20,000 in shares, you’re using 2:1 leverage. A 20% gain becomes 40% on your capital. But a 20% loss becomes a 40% loss — plus the interest on the borrowed capital.
Leverage dramatically amplifies both gains and losses. A levered investor can be wiped out by market movements that a non-levered investor would easily survive. The 2008 financial crisis demonstrated on a massive scale what happens when leverage is excessive — forced selling as investors receive margin calls accelerates market declines.
For most retail investors, leverage should be approached with extreme caution — if at all. Understanding what is leverage and margin trading fully before using it is non-negotiable.
Practical Strategies for Generating Returns From Shares
Buy and Hold (Long-Term Investing)
The simplest and, for most investors, most effective approach. Buy shares in quality companies at reasonable prices and hold them for years or decades. Allow compounding to work. Avoid the temptation to trade frequently.
Research consistently shows that long-term buy-and-hold investors outperform the majority of active traders after costs and taxes. Warren Buffett’s famous observation: “The stock market is a device for transferring money from the impatient to the patient.”
Value Investing
Seek shares trading below their intrinsic value. Buy when the “margin of safety” — the gap between market price and intrinsic value — is wide. Sell when the share price reaches or exceeds fair value.
Value investing requires patience and the willingness to hold unfashionable companies during periods of underperformance.
Dividend Investing
Build a portfolio of companies with strong, growing dividends. Reinvest those dividends to maximise compounding. Focus on payout sustainability (payout ratio, free cash flow coverage) rather than just headline yield.
Growth Investing
Identify companies with exceptional revenue growth, expanding markets, and durable competitive advantages. Accept high valuations in exchange for expected future earnings growth. The key risk: if growth disappoints, high-multiple stocks can fall dramatically.
Using Technical Analysis to Time Entries and Exits
Technical traders use chart patterns and indicators to identify optimal points to buy or sell. Tools like moving averages, RSI, and Bollinger Bands help assess whether a stock is trending, overbought, or oversold.
Understanding moving averages in forex trading and the RSI indicator gives you pattern-recognition tools that apply across asset classes, including equities.
Shares Within a Broader Portfolio
Shares don’t exist in isolation — they’re one component of a diversified portfolio that may include bonds, property, commodities, and cash.
The appropriate weight of shares in your portfolio depends on:
- Your time horizon: Longer horizons justify higher equity allocations
- Your income needs: Dividend-paying shares can partially substitute for bond income
- Your risk tolerance: Shares are more volatile than bonds; ensure you can hold through drawdowns
- Market valuations: At historically extreme valuations, reducing equity exposure slightly and maintaining dry powder has merit
The principle of building a balanced investment portfolio treats shares as the primary growth engine while using other asset classes to manage overall portfolio risk.
Common Mistakes Shareholders Make
Selling in panic: Selling during market downturns locks in losses permanently. If your investment thesis is intact, a falling price is an opportunity, not a reason to sell.
Chasing past performance: Buying shares that have recently risen sharply often means buying at the top. Strong recent performance does not predict future performance.
Ignoring valuation: Overpaying for a great company is still a mistake. A wonderful company at the wrong price is a poor investment.
Neglecting position sizing: Concentrating too much capital in a single share creates catastrophic downside if that company fails. No single share should represent more than 5-10% of a well-diversified portfolio.
Trading too frequently: Transaction costs, taxes on gains, and behavioural errors compound to destroy returns for frequent traders. Unless you have genuine edge, less activity is almost always better.
Letting emotions drive decisions: Fear and greed are the investor’s worst enemies. A rules-based approach to buying and selling — grounded in stop-loss and take-profit orders and clear entry/exit criteria — removes emotion from the equation.
Getting Started: Your First Steps as a Shareholder
- Open a tax-efficient account first: In the UK, a Stocks and Shares ISA allows you to invest up to £20,000 per year with no capital gains or income tax on returns. Always use your tax allowances before investing in a taxable account.
- Start with low-cost index funds: Before picking individual stocks, consider starting with a broad market index ETF. This gives you diversified equity exposure at minimal cost while you develop your investment knowledge.
- Learn to read basic financial statements: The income statement, balance sheet, and cash flow statement are the three windows into a company’s financial health. Learning to read them — even at a basic level — will transform your ability to evaluate investments.
- Start small and grow: You don’t need large capital to begin. Many platforms allow investment from as little as £1. Build experience and confidence gradually.
- Stay educated: Markets are constantly evolving. Continuous learning — understanding new sectors, monitoring economic indicators, refining your analytical skills — is what separates improving investors from those who repeat the same mistakes.
Conclusion
Shares are ownership stakes in real businesses. They generate returns through two fundamental mechanisms: capital appreciation as the business grows in value, and dividend income distributed from profits. Both can compound powerfully over time when combined with discipline, patience, and a coherent investment strategy.
Understanding what shares are — legally, economically, and practically — is the foundation of all equity investing. From this foundation, you can build expertise in valuation, portfolio construction, risk management, and the behavioural discipline that separates successful investors from the rest.
The markets reward those who understand what they own, buy at reasonable prices, diversify intelligently, and maintain composure through inevitable periods of volatility. That’s not a complicated formula — but it requires knowledge, patience, and commitment to execute.
Start with this foundation. Build from here.
