Key Things You Need to Know Before Trading Stocks
Trading stocks can look straightforward: choose a company, buy its shares, and sell them later. In practice, successful participation in equity markets requires much more than knowing how to place an order.
Stock prices can move sharply in response to company results, economic data, interest rates, market sentiment, geopolitical events and unexpected news. The fact that a company is well known does not automatically make its shares a good trade, and a rising market does not eliminate the possibility of losses.
Before trading stocks, it is important to understand what you are actually buying, how prices are determined, how orders work, what drives volatility, and how risk should be managed. For Australian traders in particular, understanding the distinction between owning shares and trading leveraged derivatives such as CFDs is also essential.
This guide outlines the core principles traders should understand before committing capital to the stock market.
What Does Trading Stocks Actually Mean?
A share represents part ownership of a company. When you buy ordinary shares, you generally become a shareholder and may have voting rights and the potential to receive dividends if the company declares them. You can also benefit from an increase in the share price if you later sell at a higher price. Conversely, the value of your holding can fall.
Stock trading generally involves attempting to benefit from changes in share prices over a particular time frame.
For example, a hypothetical trader might buy 500 shares at $10 each, creating a $5,000 position before transaction costs. If the price subsequently rises to $11, the position has increased in value by $500. If the price instead falls to $9, it has declined by $500.
The example is purely hypothetical. It illustrates an important principle: the amount of capital committed does not remove market risk.
Some traders hold positions for years, while others operate over weeks, days or even minutes. The shorter the trading timeframe, the more important factors such as liquidity, volatility, execution and transaction costs can become.
Understand What Moves Share Prices
A stock price is ultimately determined by supply and demand in the market, but the reasons behind changes in supply and demand can be complex.
Several factors can influence a company’s share price.
Company fundamentals
A company’s financial performance remains an important consideration. Traders and investors may examine:
- Revenue growth
- Profitability and earnings
- Cash flow
- Debt levels
- Profit margins
- Dividend history
- Management and business strategy
- Competitive position
Australian listed companies publish financial information and market announcements that can help investors assess business performance.
However, a company can report strong results and still see its share price decline. The reason may be that the market had already expected even stronger results.
Economic conditions
Broader economic conditions can affect entire sectors or markets.
Interest rates, inflation, employment conditions, economic growth and consumer spending can all influence expectations about corporate earnings and valuations.
For example, higher interest rates can affect borrowing costs for businesses and consumers while also changing how investors value future earnings. The impact will vary between companies and industries.
Market sentiment
Prices are not driven by fundamentals alone.
Investor expectations, positioning, news flow and market psychology can cause substantial short-term movements. A stock may move considerably even when there has been no major change in the underlying business.
This is one reason traders should avoid assuming that a price movement will continue simply because a chart has recently moved in one direction.
Know the Difference Between Investing and Short-Term Trading
The terms investing and trading are sometimes used interchangeably, but they can involve very different approaches.
An investor may focus on a company’s long-term prospects and hold shares for years. A short-term trader may instead attempt to capture price movements over days or weeks.
Neither approach is automatically superior.
The appropriate approach depends on factors such as:
- Investment or trading objectives
- Time available for market analysis
- Risk tolerance
- Financial circumstances
- Trading experience
- Preferred timeframe
- Ability to withstand losses and volatility
A common mistake is adopting a short-term trading strategy without recognising the time, discipline and risk management it requires.
Learn How Orders Work
Knowing the difference between order types is a basic but important part of stock trading.
A market order instructs the broker to execute at the next available market price. A limit order specifies the maximum price you are willing to pay when buying, or the minimum price you are willing to accept when selling.
Consider a hypothetical stock currently quoted around $25.
A trader placing a market buy order is seeking immediate execution, but the final execution price may differ from the displayed price, particularly when market conditions are moving quickly.
A trader placing a limit order at $24.80 is specifying the maximum purchase price. The order may remain unfilled if the market does not reach that level.
Understanding these differences can help prevent avoidable execution errors.
Liquidity and Volatility Matter
Not every stock trades with the same level of liquidity.
Liquidity refers broadly to how easily an asset can be bought or sold without causing a significant price impact. Highly liquid stocks generally have more buyers and sellers available, while less liquid securities can have wider spreads and more difficult execution.
Volatility describes the degree and speed of price movement.
High volatility can create opportunities for active traders, but it also increases uncertainty and can produce larger losses over short periods.
A stock that moves 8% in a day is not necessarily better to trade than one that moves 1%. The important question is whether the level of volatility is appropriate for the trader’s strategy and risk controls.
Research Before You Trade
A trading decision should have a reason behind it.
That does not mean every trader needs to conduct extensive fundamental analysis. A technical trader, for example, may base decisions primarily on price action, market structure, volume or other technical indicators.
The key is understanding what information your decision relies upon.
Before entering a position, consider questions such as:
- Why am I considering this trade?
- What would prove my analysis wrong?
- Where will I exit if the trade moves against me?
- How much capital am I prepared to risk?
- Is the stock sufficiently liquid for my strategy?
- Are there upcoming announcements or events that could materially affect the price?
- What are the transaction costs?
This process can turn an impulsive trade into a defined trading decision.
Risk Management Comes Before Profit Targets
One of the most important principles in trading is that risk should be considered before potential reward.
A trader cannot control whether a position will ultimately be profitable. They can, however, control several aspects of the trade, including position size and the amount of capital exposed.
A basic risk-management framework may include:
- Defining an acceptable loss before entering
- Avoiding unnecessarily large positions
- Using diversification where appropriate
- Maintaining sufficient cash or liquidity
- Understanding how volatility affects position size
- Avoiding decisions driven by fear or excitement
- Reviewing losing trades rather than automatically trying to recover losses
Diversification can reduce the impact of a single company, sector or market performing poorly, although it cannot eliminate investment losses.
Don’t confuse conviction with risk control
Being highly confident in a trade does not make the trade less risky.
A company can announce unexpected news. A market can gap sharply lower. A technical setup can fail. A broader sell-off can affect even companies with strong fundamentals.
Risk management exists because uncertainty cannot be removed from financial markets.
Understand Trading Costs
Profit and loss should not be assessed solely by looking at the entry and exit prices.
Depending on the broker and market, costs may include brokerage, platform fees, foreign exchange charges for international shares and other transaction-related expenses. Australian investors may also have tax obligations relating to dividends and capital gains.
For active traders, repeated transaction costs can become particularly relevant.
For example, a hypothetical strategy that produces a small gross gain on many trades may look attractive before costs but considerably less attractive after brokerage and other expenses are included.
The practical lesson is simple: calculate the economics of the strategy after costs, not before them.
Shares Are Different From Stock CFDs
This distinction is particularly important for traders considering leveraged products.
When you purchase a share, you generally acquire an ownership interest in the company. A CFD, by contrast, is a derivative that allows you to speculate on changes in the price of an underlying asset without owning that asset.
CFDs can provide exposure to rising or falling markets, but leverage magnifies the effect of price movements. Financing charges, spreads and other costs can also affect results.
ASIC’s Moneysmart currently describes CFDs as high-risk, complex and costly products and reports that most retail investors lose money trading them. ASIC reported that 68% of retail CFD investors lost money in the 2024 financial year, with aggregate losses exceeding $458 million including fees.
This is not an argument against understanding derivatives; it is a reminder that leveraged trading requires a different level of risk awareness from simply buying shares.
Anyone considering CFDs or other leveraged products should understand the relevant product disclosure documents, costs, leverage mechanics and potential losses before trading.
Common Mistakes New Stock Traders Make
Several mistakes appear repeatedly among inexperienced market participants.
Trading based on headlines alone
News can move prices quickly, but the initial market reaction does not necessarily tell you what happens next.
Chasing a rapidly rising stock
A strong recent move can create fear of missing out. Entering simply because a stock has already risen can leave a trader exposed to an unfavourable risk/reward profile.
Ignoring position size
Even a sensible trade idea can become dangerous if the position is too large relative to available capital.
Averaging down without a plan
Buying more after a price falls can reduce the average entry price, but it can also increase exposure to a trade that is moving against you. Averaging down should not be treated as an automatic risk-management strategy.
Overtrading
More trades do not necessarily mean better results. Frequent trading can increase costs and create more opportunities for emotional decision-making.
Failing to review performance
A trading journal can help identify recurring errors in entries, exits, position sizing and discipline.
A Practical Pre-Trade Checklist
Before placing a stock trade, consider running through the following checklist:
| Question | Why it matters |
| What is the reason for the trade? | Establishes a clear decision framework |
| What is the trading timeframe? | Helps determine relevant market factors |
| What could make the analysis wrong? | Defines downside scenarios |
| How large is the position? | Controls capital exposure |
| How liquid is the stock? | Affects execution and potential slippage |
| What are the trading costs? | Determines the true break-even point |
| Are important announcements approaching? | Identifies potential event risk |
| Is the trade consistent with my risk tolerance? | Prevents unsuitable exposure |
The checklist does not guarantee a successful trade. Its purpose is to encourage a more structured decision-making process.
Key Takeaways
Before trading stocks, make sure you understand:
- A share represents ownership in a company and can generate returns through price appreciation and, where applicable, dividends.
- Share prices can move because of company-specific developments, economic conditions and market sentiment.
- Different trading timeframes require different approaches to research, execution and risk management.
- Market and limit orders behave differently and should be understood before use.
- Liquidity, volatility and transaction costs can materially affect trading outcomes.
- Diversification can reduce concentration risk but cannot eliminate market losses.
- Position sizing and predefined risk limits are central components of responsible trading.
- Leveraged products such as CFDs are fundamentally different from owning shares and carry significant additional risks.
- No trading strategy can remove uncertainty from financial markets.