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Basics of Stock Trading
Wealth BuildingStocks, ETFs & Trading
03 Mar 2025  I  3 mins read

Before you venture deeper into your stock trading journey, this article covers the basics you should know. You can choose to be an occasional trader – buying and selling for a longer-term investment portfolio – or a much more active one where you look to make shorter-term profits.

Understanding bid & ask: Why are there two different prices for the same stock?

  • The bid is the price investors can sell a stock on the open market
  • The ask is the price investors can buy a stock on the open market

Understanding spreads: What does the difference between the bid and ask represent?

  • The difference between the bid and the ask is called the spread
  • Spreads are an indicator of market liquidity: the smaller the spread, the higher the liquidity, and vice versa.

Market makers and market takers: What do these terms mean?

  • Market makers are entities responsible for continously quoting prices in a certain market. They are typically banks or brokerage companies.
  • Market takers are smaller individual participants who can only ‘take’ the prices market makers offer.
  • Price takers buy at the ask price and sell at the bid price, but market makers buy at the bid price and sell at the ask price.

Understanding orders: What are orders?

  • Orders are instructions placed by investors to buy or sell a certain stock
  • It can be made to a broker, brokerage firm or through a trading platform
  • There are 3 basic types of orders: market orders, limit orders and stop loss orders

Market Orders

  • An order to buy or sell a certain quantity of a stock at the prevailing market price
  • Market orders can be filled almost immediately if there is enough volume to meet the order

Limit orders

  • An order to buy or sell a certain quantity of a stock at a specific price (or better)
  • Limit orders are filled only when there is enough volume at the specified price or better
  • For example, an investor sets a limit order to buy Stock X at $100 – the system will only place the order if the price is $100 or less

Stop loss orders

  • An order to sell a certain quantity of stock if it dips to a specific price
  • It is a specific type of limit order used to minimises losses on a stock by automatically selling it once it falls to a certain price
  • For example, if an investor bought Stock X at $100, setting a stop loss at $80 will limit the maximum losses to $20 a share

How long will orders remain open?

There are two types of order durations – good till day (GTD) and good till cancel (GTC).

  • A GTD order will be cancelled at the end of the trading day
  • A GTC order will stay open indefinitely either until the order is executed or the investor manually cancels it.

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