A clear guide to what the stock market is, why it exists and how buyers and sellers meet.
A market for ownership
A common share represents an ownership interest with rights defined by its share class, generally a residual claim after creditors and senior securities. The stock market is the network of exchanges, venues, brokers and systems that lets investors buy and sell those interests.
Primary and secondary markets
Companies can raise capital by issuing shares in the primary market. After issuance, investors trade existing shares with one another in the secondary market. Most prices you see during the day come from secondary-market activity.
Why prices move
Prices change as participants continually reassess a company’s future cash flows, risk and alternatives. New information, expectations, liquidity and positioning all affect what buyers will pay and sellers will accept.
See what market cap measures, how it changes and why share price alone says little about company size.
Price multiplied by shares
Market capitalization equals the current share price multiplied by shares outstanding. A $20 stock can represent a larger company than a $200 stock if it has far more shares.
What size can suggest
Large-, mid- and small-cap labels can provide context about scale, liquidity and business maturity, but category boundaries vary by source and over time.
Market cap is not enterprise value
Market cap measures equity value. Enterprise value adds debt and other claims while subtracting cash under a chosen methodology.
Use it as a starting point
Market cap does not reveal profitability, balance-sheet strength or whether a stock is expensive. Connect size with fundamentals and risk.
The same learning map as Learn: build foundations, understand value, then choose an optional specialist direction. Every topic lists its lessons in the shared reading order.
Understand ownership, exchange, price discovery and the difference between a business and its traded shares.
The connection to understand
A share is a claim on a business. Orders meet through market infrastructure; a trade records a price agreed by two sides, not an authoritative estimate of intrinsic value.
02Stocks & Corporate Finance6 lessons · Read in sequence
Connect share ownership to capital raising, distributions, dilution and per-share economics.
The connection to understand
Company value and value per share can move differently when financing changes the denominator. Evaluate capital uses alongside the price paid, cost of capital and remaining liquidity.
03Funds, ETFs & Indexes6 lessons · Read in sequence
Look through a fund label to holdings, weighting, costs, structure and overlap.
The connection to understand
A fund holds exposures; an index defines a measurement rule. Trading structure and recurring costs can affect the investor experience even when funds pursue a similar objective.
Evaluate concentration, shared drivers, time horizon, liquidity and loss capacity as one portfolio system.
The connection to understand
Weights describe concentration, while correlations and underlying drivers determine how exposures behave together. Diversification reduces some risks without eliminating market losses.
05Financial Statements & Business Quality7 lessons · Read in sequence
Read income, balance-sheet and cash-flow information together rather than trusting one headline profit number.
The connection to understand
Profit is recorded over a period. The balance sheet records resources and claims at a date. Cash-flow statements reconcile cash movement; working capital, reinvestment and financing connect the three views.
06Valuation & Expectations6 lessons · Read in sequence
Evaluate the price of a business against cash generation, growth, risk and the expectations already embedded in that price.
The connection to understand
A multiple is a compressed statement of assumptions. Higher growth can justify more value only when economics and risk support it; changed assumptions can offset apparently strong reported results.
07Bonds, Rates & Credit6 lessons · Read in sequence
Separate contractual coupons from yield, duration, credit exposure and reinvestment risk.
The connection to understand
A bond price reflects discounted promised payments. Treasury yields, credit spreads, maturity and options can change simultaneously; a rate cut does not guarantee a positive return in every bond portfolio.
Interpret inflation, growth, labor data and central-bank decisions through expectations and changing conditions.
The connection to understand
Compare reported data with expected and prior data, inspect revisions and composition, then ask which growth, inflation or discount-rate assumption actually changed.
09Global & Cross-Asset6 lessons · Read in sequence
Connect currency, commodities, international holdings and policy without assuming fixed asset reactions.
The connection to understand
Local asset returns and currency translation jointly affect an international investor. Commodity exposure depends on instrument structure; stocks, bonds and gold can respond differently across plausible paths.
Study execution and behavioral errors with defined assumptions and a record of evidence available beforehand.
The connection to understand
Order choices trade price control against execution certainty. A chart describes recorded price behavior; neither an attractive pattern nor one profitable result validates a decision process.
Understand rights, obligations, payoff asymmetry, time, volatility and leverage before evaluating a contract.
The connection to understand
An option payoff depends on strike, underlying value and premium; its pre-expiration price also reflects time, volatility and other inputs. Correct direction alone is insufficient.
Verify claims in filings, understand account mechanics and keep complete records across institutions.
The connection to understand
Primary-source research and recordkeeping protect against omissions. Broker forms and summaries may not capture every account, lot or tax rule relevant to a complete decision.
Follow the same calculator order as Tools: simple numbers first, then long-term assumptions, risk and optional specialist models. All inputs are illustrative.
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