More about spread
Spread refers to the difference between the bid price and the ask price of a security in financial markets. It serves as a key indicator of market liquidity and transaction costs. Understanding spread is essential for the trader to keep down trading costs. This breakdown will explain in detail:
1. Components of spread
Bid price
The highest price a buyer is willing to pay for a security.
Ask price
The lowest price a seller is willing to accept for a security.
Spread
Calculated as:
Spread = Ask price – Bid price
2. Types of spread

Tight spread
A small difference between the bid and ask prices, indicating high liquidity and active trading in the security. This means that buyers and sellers are closely matched in their price expectations.
Wide spread
A larger difference between the bid and ask prices can indicate lower liquidity, less market activity, or higher uncertainty about the security's value.
3. Impact of spread on trading
The spread represents the transaction cost for traders; it is essentially the minimum profit (or loss) a trader must account for when buying and selling a security.
When you place a buy order, you do so at the ask price, and when you sell, you do so at the bid price. The spread can thus affect the profitability of trading strategies, especially for short-term traders or high-frequency traders.
4. Factors influencing spread
Liquidity
More liquid securities (like major stocks or currencies) tend to have tighter spreads, while less liquid or more volatile securities may exhibit wider spreads.
Market conditions
Economic news, market events, or changes in supply and demand can influence spread sizes.
Time of day
Spreads can vary throughout the trading day; they may be tighter during active trading hours and wider during off-hours or periods of low activity.
Understanding the spread is essential for traders and investors as it can significantly influence their trading decisions and overall costs.
What the bid-ask spread shows us about the market
The bid-ask spread provides valuable insights into various aspects of a financial market and the specific security being traded. It is a useful indicator of market conditions, liquidity, trading costs, and overall investor sentiment. Traders and investors often monitor the spread to inform their trading strategies and assess the viability of entering or exiting positions in the market.
Here are several key insights that a bid-ask spread can indicate:
Liquidity
A narrower spread generally indicates higher liquidity, meaning there are many buyers and sellers actively trading the security. Conversely, a wider spread suggests lower liquidity, which can indicate that fewer participants are willing to trade at any given time.
Market activity
A tight spread may suggest high trading activity and competition among traders to buy and sell the security. A wider spread often reflects reduced market interest or trading activity.
Transaction costs
The spread represents a transaction cost for traders. A wider spread means higher costs for entering and exiting positions, which can influence trading strategies and profitability.
Price volatility
Wider spreads can be associated with increased price volatility or uncertainty regarding the future price of a security. In times of market stress or significant news, spreads tend to widen as traders become more cautious.
Market sentiment
Changes in the spread can reflect shifts in market sentiment. For example, if the spread widens suddenly, it may signify uncertainty or apprehension among traders, while a narrowing spread can suggest confidence or a consensus on the security’s price.
Demand and supply
The relationship between the bid and ask prices within the spread highlights the balance of supply and demand for the security. An imbalance can lead to price movements.