Stock Market Definitions

After-Hours Trading occurs when investors buy or sell stocks outside regular trading hours, typically after the market closes. It usually takes place between 4:00 PM and 8:00 PM EST. While it offers flexibility, it also comes with risks such as lower liquidity and higher volatility.

A Bear Market is a period when stock prices fall by 20% or more from recent highs, typically driven by economic downturns or investor pessimism. Bear markets are marked by negative sentiment and declining investor confidence. Traders often use strategies like short selling to profit during these periods.

The Bid-Ask Spread is the difference between the highest price a buyer is willing to pay for an asset (bid) and the lowest price a seller will accept (ask). A narrow spread indicates high liquidity, while a wide spread suggests low liquidity and increased trading costs.

These are rare but large events that move the market prices by a significant amount. It could be a positive move, but most commonly used in the context of a negative market shock.

The term was popularised by Nassim Taleb in his outstanding books “Fooled by Randomness” and “The Black Swan”.

Blue Chip Stocks are shares of large, reputable, and financially sound companies with a history of reliable performance and dividend payments. Examples include Apple, Microsoft, and Coca-Cola. These stocks are considered safe, long-term investments due to their stability and resilience.

Bonds are debt investments in which investors loan money to the issuing entity for a predefined timeframe in exchange for regular interest payments. Interest payments may be fixed or variable but are usually pre-specified according to a certain formula.

Entities that issue bonds can include federal / state / municipal governments, Corporations. The holders of the bonds are effectively the holders of the debt of the issuing entity.

A Broker is an individual or firm that facilitates the buying and selling of financial assets, such as stocks and bonds, on behalf of clients. Brokers charge commissions or fees for their services and may also provide market analysis and investment advice.

A Bull Market is a period of rising stock prices, typically by 20% or more from recent lows. It reflects investor confidence and economic optimism. Bull markets encourage buying, as traders anticipate continued upward momentum and potential profits.

Buy and hold is a passive investing strategy in which the investor identifies shares to include in their portfolio and purchases them with the intention of never selling them (or at least not selling them in the foreseeable future) regardless of how the share price moves over time.

A contract which gives the contract holder the right, but not the obligation, to buy the underlying security at a certain price (strike price) on or before a certain date (expiration date)

A Contract for Difference (CFD) is a financial derivative that allows traders to speculate on price movements without owning the underlying asset. Profits or losses are calculated as the difference between the opening and closing prices. CFDs enable trading on leverage but carry high risk.

A correction is a move against the main trend of more than 10%. There is no single person that ‘corrects’ the price, it is just that the participants in the market cause the price to trade lower.

A crash is a large, sudden and unexpected drop in asset values typically caused by broad market panic precipitated by an unexpected event. Typically a stock market crash (Such as occurred in October 1987) results in a drop of 30% or more over just a few days.

Note that the financial media use the term ‘crash’ far more than is actually warranted. Note the difference between a pullback / correction / crash (A pullback is a move of less than 10%, correction is more than 10%). For further explanation please watch the video in the Bull Market / Bear Market section above.

Derivatives are financial contracts whose value is derived from underlying assets like stocks, commodities, or currencies. Common derivatives include futures, options, and swaps. They are used for hedging risk or speculating on asset price movements.

A Dividend is a portion of a company’s earnings distributed to shareholders, typically in cash or additional shares. Dividends are paid regularly (e.g., quarterly) and represent a way for investors to earn passive income from their investments.

Equity represents ownership in a company through shares of stock. It reflects the residual interest in the company’s assets after deducting liabilities. Investors purchase equity to gain potential capital appreciation and dividend income.

An Exchange-Traded Fund (ETF) is a basket of assets, such as stocks or bonds, traded on an exchange like a single stock. ETFs offer diversification, low costs, and liquidity, making them popular among individual and institutional investors.

Futures are standardized contracts to buy or sell an asset at a predetermined price on a specific date. Commonly used for commodities and financial instruments, futures are used for hedging or speculation. They involve substantial risk due to leverage.

An Index is a statistical measure that tracks the performance of a group of assets, like stocks or bonds, representing a particular market segment. Examples include the S&P 500 and NASDAQ Composite. Indices help investors gauge market trends and performance.

An Index Fund is a type of mutual fund or ETF that passively replicates the performance of a market index. They offer diversification and lower fees compared to actively managed funds, making them a popular choice for long-term investors.

An Initial Public Offering (IPO) is the process by which a private company offers shares to the public for the first time. IPOs provide capital for growth and liquidity for early investors but come with risks like price volatility and lack of historical performance.

Leverage involves using borrowed capital to increase the potential return of an investment. It amplifies both gains and losses, making it a high-risk strategy. Traders use leverage to control larger positions with a smaller amount of capital.

A Limit Order instructs a broker to buy or sell a security at a specific price or better. It ensures price precision but may not execute if the market doesn’t reach the desired level. Limit orders are useful when aiming to buy at a lower price or sell at a higher price.

Liquidity measures how quickly an asset can be bought or sold without significantly affecting its price. High liquidity indicates that the asset can be easily traded, while low liquidity can result in wide bid-ask spreads and price volatility.

Watch the video below for an explanation of what is meant by ‘the long side’ and ‘the short side‘.

Margin Trading involves borrowing funds from a broker to trade financial assets, increasing potential gains but also amplifying losses. Margin accounts require a minimum balance and may trigger margin calls if equity falls below required levels.

Market Capitalization, or “market cap,” represents the total value of a company’s outstanding shares. It is calculated by multiplying the current share price by the number of shares outstanding. Companies are classified as large-cap, mid-cap, or small-cap based on their market cap.

A Market Maker is a firm or individual that provides liquidity to the financial markets by continuously buying and selling securities. They profit from the bid-ask spread and help maintain orderly and efficient trading.

A Market Order is an instruction to buy or sell a security immediately at the best available price. It guarantees execution but not the price, making it suitable for fast-moving markets where speed is more important than precision.

A Mutual Fund pools money from many investors to purchase a diversified portfolio of assets. Managed by professional fund managers, mutual funds offer diversification but may come with management fees that impact returns.

Options are financial derivatives giving the buyer the right, but not the obligation, to buy or sell an underlying asset at a predetermined price before a specified date. Calls and puts are the two main types of options, used for hedging or speculation.

Over-the-Counter (OTC) Trading involves the buying and selling of financial instruments directly between parties, rather than through a centralized exchange. OTC markets handle less liquid assets and involve higher risks compared to exchange-traded assets.

Pre-Market Trading occurs before the regular trading session, typically from 4:00 AM to 9:30 AM EST. It allows investors to react to news and events before the official market open but carries risks like low liquidity and increased volatility.

A contract which gives the contract holder the right, but not the obligation, to sell the underlying security at a certain price (strike price) on or before a certain date (expiration date)

A Sector refers to a group of companies operating in the same industry or market segment. Examples include technology, healthcare, and finance. Sectors help investors compare companies with similar business models and identify growth or defensive opportunities.

Short Selling is a trading strategy where investors borrow shares to sell them at the current price, hoping to repurchase them later at a lower price. It’s a way to profit from falling markets but carries unlimited risk if the stock price rises instead.

A Stop Order is a type of order to buy or sell a security once it reaches a specified price, known as the stop price. It helps traders limit losses or secure profits by triggering automatic execution when the market hits the desired level.

A Stop-Loss Order is a predetermined order designed to limit an investor’s loss on a trade. When the security reaches the specified price, the order is executed as a market order, helping traders manage risk and protect capital.

A Stock Exchange is a marketplace where securities like stocks, bonds, and ETFs are bought and sold. Major exchanges include the NYSE, NASDAQ, and ASX. Stock exchanges provide liquidity, transparency, and a regulated environment for trading.

The Stock Market is a collection of exchanges and platforms where shares of publicly traded companies are bought and sold. It serves as a critical component of the global economy, enabling companies to raise capital and investors to build wealth.

A Ticker Symbol is a unique series of letters used to identify a publicly traded company’s stock. For example, AAPL represents Apple Inc. Ticker symbols simplify stock trading and tracking on exchanges and financial platforms.

Value investing is the purchasing of shares in companies that are ‘cheap’ relative to some measure of the underlying value of the company. The valuation can be performed in many ways, and is based on the financial performance and prospects of the company.

A Value Stock is a stock that appears undervalued based on fundamental analysis metrics like price-to-earnings ratio (P/E) or book value. Value investors seek these stocks, believing their prices will eventually reflect their true worth.

Volatility measures the rate at which the price of a security fluctuates over time. High volatility indicates significant price swings, while low volatility suggests more stable prices. Traders often use volatility indicators to assess market risk and potential profit opportunities.