Why Understanding Bid Prices Matters for Traders

Key Takeaways

What is the Bid Price?

The bid price is the highest price buyers in the market are willing to pay for an asset. The ask (or offer) price is the lowest selling price sellers are willing to accept. Together, these two prices form the two-sided market quotation and define the current value of each asset.

If a EUR/USD quote appears as 1.0850/1.0852, then 1.0850 is the bid price and 1.0852 is the ask price. You pay the ask price when you want to buy, and the bid price when you want to sell.

Bid Price vs. Ask Price: Understanding the Difference

Investors trade at the bid price when selling and at the ask price when buying. This basic mechanism automatically creates a cost at each position opening.

Forex example: If the EUR/USD quote is 1.0850/1.0852:

• If you sell, you sell at 1.0850 (bid).
• If you buy, you buy at 1.0852 (ask).

Stock example: If a stock is quoted at 100.00/100.05 TL:

• If you want to sell the stock, you receive 100.00 TL.
• If you want to buy the stock, you pay 100.05 TL.

This 0.05 TL difference puts you in a 5 kurus loss the moment you open the position. You are knowingly at break-even until the stock reaches 100.05 TL.

Real-World Example of Bid and Ask Pricing

Let’s examine a real-world trading scenario using a $25 stock as an example.

Quotation: 25.00 (bid) / 25.00 (bid) / 25.04 (ask)
Spread: $0.04

Scenario 1 – Buying:

• You want to buy 100 shares
• Price you will pay: 25.04 x 100 = 25.04 x 100 = 2.504
• If you try to sell the shares immediately: 25.00 x 100 = 25.00 x 100 = 2.500
• Instant loss: $4 (spread cost)

Scenario 2 – Selling:

• You sell your 100 shares
• Price, you will buy them back: 25.00 x 100 = 25.00 x 100 = 2.500
• You will buy the shares back immediately If you were: 25.04 × 100 = 25.04 × 100 = 2.504
• Instant loss: $4 (spread cost)

The moment you open a position; you start with a disadvantage equal to the spread before the market moves in your favor.

What is the Bid-Ask Spread and Why Does It Exist?

The spread is the difference between the ask and bid (spread = ask – bid). This difference is compensation for the inventory risk faced by market makers and liquidity providers. Market makers provide liquidity by continuously offering buy and sell quotes, but the price of the assets they hold can change unexpectedly. The spread compensates for this risk and ensures the market remains operational.

How to Calculate the Bid-Ask Spread

Forex (pip-based calculation):

EUR/USD: 1.0850/1.0852
Spread = (1.0852 – 1.0850) × 10.000 = 2 pips

USD/JPY: 149.50/149.53
Spread = (149.53 – 149.50) × 100 = 3 pips

Stock (percentage-based calculation):

Stock price: 100.00/100.20 TL
Spread % = [(100.20 – 100.00) / 100.00] × 100 = 0.20%

Amazon stock: 175.00/175.00/175.05
Spread % = [(175.05−175.05−175.00) / $175.00] × 100 = 0.029%

Fixed vs. Variable (Floating) Spreads

Fixed spread: The broker guarantees a specific spread regardless of market conditions. For example, always 2 pips for EUR/USD. It doesn’t change even during periods of high volatility, but it’s generally wider than variable spreads.

Floating spread: It constantly changes according to market liquidity. It can be very narrow under normal market conditions (eUR/USD 0.5 pips), but it can suddenly widen (up to 5-10 pips) during economic data releases or periods of low liquidity.

Broker selection depends on your trading strategy. Investors trading during news events may prefer a fixed spread, while those active under normal market conditions will achieve lower costs with a variable spread.

Understanding Narrow Spreads vs. Wide Spreads

Narrow (tight) spread: The difference between bid and ask is minimal. Seen in highly liquid assets like EUR/USD (0.5-1 pip). This means lower transaction costs for investors and makes it easier for the position to become profitable.

Wide spread: There is a large difference between bid and ask. Encountered in exotic currency pairs (like TRY/ZAR) or low-volume stocks (20-50 pips or more). This creates high transaction costs and requires significant price movement for the position to break even.

A widespread usually gives the following signals:

• Low market liquidity
• High volatility or uncertainty
• Periods of reduced trading volume
• High market maker risk

How Are Bid and Ask Prices Determined?

Bid and ask prices are the result of supply and demand forces from all participants in the market. Buyers want to buy at lower prices, and sellers want to sell at higher prices. The point where these opposing forces intersect forms the current bid and ask price.

Order flow plays a critical role. When large buy orders arrive, the bid price experiences upward pressure. When heavy sell orders arrive, the ask price experiences downward pressure. Market makers constantly monitor this order flow and dynamically adjust their quotes.

Market makers determine bid and ask levels by evaluating incoming order sizes, the direction of price movements, their current positions, and overall market volatility. During periods of high uncertainty, they widen the spread for risk management. During low-risk, high-volume periods, they try to attract more trades by narrowing the spread.

The Direct Link Between Liquidity and Bid-Ask Spreads

Spread Behavior Across Different Currency Pairs and Asset Classes

Forex Major Pairs:

The most liquid pairs, such as EUR/USD, GBP/USD, and USD/JPY, offer spreads of 0.5-1 pip (under 1 basis point). Daily trillion-dollar volume ensures almost consistently narrow spreads.

Forex Minor Pairs

Pairs like EUR/GBP and AUD/NZD show spreads of 2-4 pips. Liquidity is lower than majors but still offers reasonable transaction costs.

Forex Exotic Pairs

Emerging market currencies like USD/TRY and EUR/ZAR have spreads of 15-50 pips or wider. Due to low liquidity and high volatility, transaction costs increase significantly.

Large-Cap Stocks

Companies in the S&P 500, such as Apple and Microsoft, generally show spreads around 4 basis points. High trading volume and a large investor base make narrow spreads possible.

Small-cap stocks

Spreads of 17 basis points or wider are common. Low daily volume and limited market maker interest increase the cost.

Crypto markets

Major pairs like Bitcoin/USDT show spreads of 2-10 basis points, while lesser-known altcoins may have spreads between 1-5%. Spreads tend to narrow as market maturity increases.

When and Why Spreads Widen

Widening spreads are a direct indicator of increased market uncertainty and risk perception.

Economic data releases: Spreads can increase 2-5 times in the 5-10 minutes before and after important announcements such as US unemployment figures and inflation data. EUR/USD, which is normally 1 pip, can widen to 5 pips.

Central bank announcements: Spreads widen significantly during Fed, ECB, or BOE interest rate decisions. Market makers protect themselves against sudden price movements.

Market opening/closing hours: Liquidity decreases and spreads widen during transition periods such as the start of the Asian session or the New York closing. Wide spreads are particularly common in forex during the Sunday-Monday transition.

Low-volume holiday periods: Trading volume decreases during major holidays such as Christmas and New Year, market depth decreases, and spreads can increase to 3-4 times their normal levels.

Geopolitical shocks: Unexpected declarations of war, terrorist attacks, or major political crises instantly cause spreads to explode.

GameStop case study (2021): In January 2021, during coordinated buying by the Reddit community, the intraday spread for GameStop stock skyrocketed to 1.8%. The spread, normally around 0.05%, widened 36 times. Volatility and supply-demand imbalances forced market makers to inflate the spread due to excessive risk.

Why the Bid-Ask Spread Matters More Than Most Traders Think

The spread is an immediate, unavoidable, and recurring cost you encounter with every trade. It’s not as obvious as commissions, but it erodes your profitability before market movement even begins. You start behind the spread the moment you open a position, and you can’t profit without price action to offset this disadvantage.

Most traders only consider market direction, ignoring the cost of the spread and misjudging their actual performance. For high-frequency traders in particular, the spread alone can be a cause of failure.

The Compounding Cost: A Real-World Case Study

Daily trader profile:

• Makes 4 full round trips of trades per day
• Buys and sells 2,000 shares in each trade
• Average spread: $0.05

Daily spread cost: 4 round trips × 2 × 0.05 × 2,000 shares = 0.05 × 2,000 shares = 800

Weekly cost (5 trading days): 800 × 5 = 800 × 5 = 4,000

Annual cost (250 trading days): 800 × 250 = 800 × 250 = 200,000**

This investor pays $200,000 annually just in spreads, regardless of market movement. Even if they achieve a 10% annual return target, the spread cost significantly erodes their net return if they are working with $2 million in capital. Without market gains, the spread alone creates a 10% loss.

Impact by Trading Style

Scalpers: Scalpers, who open and close positions within seconds or minutes, are the group most affected by spreads. They may make 20-50 trades a day and pay spreads each time. While their target profit is usually around 5-10 pips, a 2-pip spread means a 20-40% cost. They need to earn 40% more to break even.

Day traders: For day traders who open 4-10 positions a day, spreads create a 5-10 times higher cost. For example, a strategy targeting 20 pips starts with a 10% disadvantage with a 2-pip spread. They need to make far more correct decisions than swing traders.

Swing traders: For swing traders who hold positions for a few days or weeks, the spread effect is less significant. For a position targeting 100-200 pips, a 2-pip spread means only a 1-2% cost. The longer time frame distributes the spread cost.

Position investors: For long-term investors holding positions for months or years, the spread is a very small fraction of the total return. With a target profit of 20-50%, a 2-4 pip spread is negligible.

Break-even requirements:

• Scalper: Requires profit 2-3 times the spread (6-9 pips profit if spread is 3 pips)
• Day trader: Requires profit 1.5-2 times the spread
• Swing trader: Requires profit 1.2 times the spread
• Position trader: Minimum impact from spread

The 90-90-90 Rule and Hidden Costs

There’s a well-known fact in the forex industry: 90% of investors lose 90% of their capital within the first 90 days. Data from the UK Financial Conduct Authority (FCA) shows that 82% of retail forex traders lose money.

One of the main reasons for this high failure rate is the neglect of spreads and transaction costs. Investors focus on market analysis but fail to account for the disadvantage they start with in every trade. When spreads, commissions, and funding costs are combined, an investor needs to consistently gain 1-2% in the right direction from the market just to break even.

The situation is even worse for investors using excessive leverage. An account trading with 100:1 leverage experiences a real loss of 0.2% with a 2-pip spread. However, in a leveraged account, this translates to a 20% loss. A few wrong trades can quickly deplete the account.

How Every Basis Point Affects Returns

Research by the CFA Institute has shown that every 1 basis point (bp) increase in the spread reduces annual yields by 0.25 percentage points. This is a cost whose compound effect becomes significant in the long term.

Örnek senaryo:

• Portfolio value: $100,000
• Target annual return: 8%
• Number of trades: 40 buy-sell trades per year (80 transactions)
• Spread: 4 bp

Total spread cost: 80 transactions × 4 bp × 100,000 = 100,000 = 3,200 annually

Net return effect: 8% target – 3.2% spread cost = 4.8% actual return

Over a 10-year period:

• With an 8% compound return: $215,892
• With a 4.8% compound return: $160,103
• Lost opportunity cost: $55,789 (26% lower savings)

The spread silently erodes returns each year, leading to significant wealth disparities in the long run.

Bid and Ask Prices in Practice: Platform Mechanics

In trading platforms, bid and ask prices are visible in price panels, order tickets, and charts. The Market Watch window usually displays in a dual-column layout: the left column lists the bid price, and the right column lists the ask price. On the order screen, the ask price is displayed by default when placing a buy order, and the bid price when placing a sell order.

On platforms like MT4, MT5, and cTrader, the price indicator usually displays both bid and ask lines together. The spread is represented by the vertical distance between the two lines and is shown in pips. Some platforms only display the bid price on the chart and indicate the ask price with a separate line or shading.

How Sell Orders Execute at the Bid Price

Sell ​​(short) orders are always executed at the bid price. The market maker pays the bid price when buying the asset from you.

Opening mechanism: EUR/USD quote: 1.0850/1.0852
You place a sell order → The position opens at 1.0850 (bid)

Profit/loss calculation: Your position opened at 1.0850. The current price is 1.0840/1.0842.
To close, you need to buy at the ask price (1.0842). Profit: (1.0850 – 1.0842) × 100,000 units = $80 (for 10 lots)

Stop Loss and Take Profit Triggering (short position):

• Stop Loss: Triggered when the bid price reaches the SL level and closes from the ask.
• Take Profit: Triggered when the bid price reaches the TP level and closes from the ask.

For a short position, you follow the bid, but the closing always happens from the ask. The spread increases your cost at the time of closing.

How Buy Orders Execute at the Ask Price

Buy (long) orders are always executed at the ask price. You pay the ask price when you buy the asset from the market maker.

Opening Mechanics: EUR/USD Quote: 1.0850/1.0852
You place a buy order → Position opens at 1.0852 (ask)

Profit/Loss Calculation: Your position opened at 1.0852. Current price is 1.0860/1.0862.
To close, you need to sell at the bid price (1.0860).
Profit: (1.0860 – 1.0852) × 100,000 units = $80 (for 10 lots)

Stop Loss and Take Profit Triggering (Long Position):

• Stop Loss: Triggered when the bid price falls to the SL level and closes at the bid.
• Take Profit: Triggered when the bid price rises to the TP level and closes at the bid.

For a long position, you watch the bid and the closing occurs at the bid. The ask you paid at the opening creates the spread cost.

Understanding Chart Lines: Bid-Based vs. Ask-Based Pricing

Most forex platforms display the bid price by default on charts. Common platforms like MT4, MT5, and TradingView are bid-based. This is a detail to consider when performing technical analysis.

Impact for a Long position: You set the support level on the chart at 1.0850. This level is the bid price. When you want to place a buy order, you buy at the ask price (e.g., 1.0852). You enter at a price far from the support level by the spread (2 pips).

Impact for a Short position: The resistance level on the chart is 1.0900 (bid). When you place a sell order, you sell at 1.0900, in which case you are perfectly aligned with the chart. For short positions, the bid-based chart is advantageous.

Solution: Some platforms offer an “ask line” option in the chart settings. If traders who trade long positions activate this option, they can more accurately assess entry points. Alternatively, adding a tolerance equal to the spread when determining support/resistance levels makes technical analysis more realistic.

Evaluating Broker Pricing Models

Brokers offer two main pricing models: spread-based and commission-based. In both, understanding the total cost of trading is more important than just looking at the spread or commission.

Spread-based model (No Commission): The broker generates revenue by adding markup to the raw spread. For example, they receive a 0.5 pip spread from the liquidity provider, and you pay 1.5 pips. There are no commissions, but there is a wide spread on each trade.

Commission-based model (Raw Spread + Commission): The broker passes on the liquidity provider’s raw spread as is (very narrow, like 0.2-0.5 pips), but charges a fixed commission per trade (e.g., $7 per lot). The total cost is the narrow spread plus the commission.

Example of total transaction cost analysis:

Model 1 (Spread-only): EUR/USD 1.5 pip spread, no commission
1 lot round trip cost: 1.5 pips × 10 = 10 = 15

Model 2 (Raw spread + commission): EUR/USD 0.3 pip spread + 7 commission (one-way) 1 lot round trip cost: (0.3 pips × 7 commission (one-way) 1 lot round trip cost: (0.3 pips × 10) + (2 × 7) = 7) = 3 + 14 = 14 = 17

In this example, the spread-only model appears cheaper. However, as trading volume increases or for larger lots, the spread-based model becomes more expensive:

5 lot round trip (Model 1): 1.5 pips × 50 = 50 = 75
5 lot round trip (Model 2): ​​(0.3 pips × 50) + 50 + 14 = 15 + 15 + 14 = $29

For large-volume traders, the commission-based model is generally more economical.

Spread Markup vs. Commission Transparency

Spread markup is an additional cost that a broker adds to the spread they receive from the liquidity provider. This markup is usually invisible, and investors are unaware of the true cost. If a broker charges you 2 pips for a pair where they charge a 0.5 pip raw spread, there is a 1.5 pip hidden markup.

The commission model is more transparent. The raw spread and commission are shown separately, and the investor knows exactly how much they are paying. The commission is clearly indicated on the account statement and trading history.

Comparison framework:

The Rise of “Effective Spread” Metrics

The effective spread is the difference between the price the investor actually pays and the current midpoint price (midpoint = (bid + ask) / 2). It is a more accurate cost indicator than the quoted spread because it reflects the actual transaction price.

Large brokers like Fidelity and Interactive Brokers now offer effective spread reports to their clients. This metric also shows price improvement. For example, if the quote is 100.00/100.05 but you can buy at 100.03 thanks to smart order routing, the effective spread is narrower than the quoted spread.

Etkili spread hesabı:

Midpoint price: (100.00 + 100.05) / 2 = 100.025
Actual purchase price: 100.03
Effective spread: (100.03 – 100.025) × 2 = 0.01 (while the coded spread is 0.05)

This metric is a critical tool for evaluating the broker’s order routing quality. A low effective spread indicates that the broker is securing price optimization from liquidity providers, offering the investor real cost savings.

Common Misconceptions About Bid Prices and Spreads

“Tight Spreads Always Mean Better Trading Conditions”

Ultra-narrow spreads aren’t always advantageous. A broker offering very narrow spreads may lack market depth or have a high risk of slippage.

A EUR/USD quote with a 0.1 pip spread might seem attractive, but if it’s only valid for very small lots or if volatility can instantly widen to 5 pips, the actual cost of trading is much higher. Furthermore, some brokers restrict or requote order speed in exchange for narrow spreads. Scalping bans or maximum position limits may also accompany narrow spreads.

A truly quality trading environment includes:

• Consistent spread (reasonable expansion even during periods of volatility)
• Deep liquidity pool (able to handle large orders)
• Fast order execution (no requotes)
• Minimum slippage

All trading conditions, not just the spread, should be considered together.

“Brokers Fully Control Spreads”

Brokers don’t control the underlying market spread; they add markup to the spread they receive from liquidity providers. The interbank spread between large banks, prime brokers, and ECNs depends on supply and demand dynamics and is outside the broker’s control.

If a retail broker receives a 0.3 pip EUR/USD spread from Tier-1 liquidity providers (like Citibank, JP Morgan) and offers you 1.2 pips, they have added 0.9 pip markup. However, the underlying 0.3 pip spread depends on how the global forex market operates.

When volatility increases or liquidity decreases, liquidity providers widen the spread, and the broker reflects this to you. During major data releases like NFP (Non-Farm Payrolls), the interbank spread can increase to 2-3 pips; a broker offering it as 5-7 pips reflects underlying market conditions, not markup.

The only thing the broker has control over is the markup amount, but the raw spread is entirely a product of market forces.

“Spreads Don’t Matter for Long-Term Investors”

Even long-term investors are affected by spreads, especially when making recurring purchases, portfolio rebalancing, or dividend reinvestments. An investor employing a monthly or quarterly buying strategy makes 12-24 trades per year and pays spreads each time.

Example scenario – Monthly investment of $1,000:

• Total annual investment: $12,000
• Average spread: 0.20% (4 bp)
• Annual spread cost: 12,000 x 0.002 = 12,000 x 0.002 = 24
• Over 20 years: $480 direct loss

However, the compounded effect is greater. This $24 annual spread cost represents a 7% loss of annual return because it is not being reinvested:

Over 20 years: 24 × (1.0720 annual average) = 24 × (1.0720 annual average) = 1,200 + opportunity cost**

The effect is more pronounced for investors who rebalance their portfolios. A $500,000 portfolio rebalanced 4 times a year:

• 0.15% spread cost each time
• Annual cost: 500,000 × 0.0015 × 4 = 500,000 × 0.0015 × 4 = 3,000
• 10 years: $30,000 direct loss

Spread affects every trader, regardless of trading frequency.

Factors That Influence Bid and Ask Prices Beyond Liquidity

Market News and Sentiment

Market news and investor sentiment influence bid and ask prices beyond liquidity. Positive news (earnings surprise, new product announcement) immediately increases buying demand; buyers are willing to offer higher bids, pushing the ask price higher. Negative news (bad economic data, corporate scandal) creates selling pressure; sellers accept lower ask prices, pulling the bid down.

Synopsis changes also affect the spread. During periods of high uncertainty (e.g., a surprise announcement from the Fed), market makers widen the spread to hedge. During periods of high risk appetite (bull market), the spread narrows because trading volume increases and the direction is predictable.

The Role of Market Makers

Market makers are professional firms that provide liquidity by offering continuous buy and sell quotes. In Nasdaq and NYSE, this role is played by specialists, while in forex, it’s typically undertaken by large banks and prime brokers.

Temel işlevleri:

• Two-sided quotation: They guarantee buying and selling by setting bid and ask prices at any time.
• Inventory management: They hold onto the assets they acquire and take on price risk.
• Spread setting: They dynamically adjust the spread according to risk, volatility, and order flow.

Risk management: When a large buy order comes in, the market maker adds the asset to its inventory. If the price reverses, it incurs a loss. To compensate for this risk, it charges a spread. During periods of high volatility, the risk increases, and the spread widens.

Arbitrage and price discovery: Market makers increase market efficiency by arbitraging price differences between different exchanges and platforms. This process ensures that bid and ask prices reflect the true supply and demand balance.

After-Hours and Extended Trading Sessions

Sessions outside of normal trading hours (pre-market, after-hours) create bid-ask imbalances due to low volume and limited participation. While the NYSE’s normal hours are 9:30-16:00 EST, liquidity drops by 70-80% despite pre-market trading from 4:00-9:30 and after-hours from 16:00-20:00.

Spread widenings:

• Normal hourly spread: 0.05% (Apple stock)
• After-hours spread: 0.25-0.50% (5-10x widening)

During these periods, the number of market makers decreases, and order books become shallow. As a result, even small orders can significantly move the price. If investors place market orders without using limit orders during these hours, they may trade at prices much worse than expected.

Risk factors:

• Heavy trading occurs in the after-hours during earnings announcements, but spreads are wide.
• There is a high risk of significant slippage due to low liquidity.
• If stop-loss orders are triggered, serious losses can occur due to the widespread.

Experienced traders prefer to manage critical positions during normal trading hours.

Practical Strategies to Minimize Spread Costs

Time Your Trades Around Peak Liquidity

Transaction timing directly affects the spread cost. During periods of highest liquidity, the spread is narrowest and order execution quality is at its best.

Optimal times for Forex trading:

• London-New York overlap (13:00-17:00 GMT): 40% of daily forex volume occurs during these 4 hours. Major pairs like EUR/USD and GBP/USD narrow by up to 0.5 pips during this period.
• Tokyo-London transition (7:00-9:00 GMT): As Asian liquidity decreases, Europe opens; reasonable spreads are found in JPY and EUR pairs.
• Times to avoid: Sunday opening (21:00-23:00 GMT), spreads widen 3-5 times. Liquidity is minimal during major holidays (Christmas, New Year).

Optimal times for stock trading:

• First hour (9:30-10:30 EST): Although opening volatility is high, volume is at its highest and spreads are narrow. Ideal for news-driven strategies.
• Last hour (15:00-16:00 EST): Liquidity increases before closing, institutional investors adjust their positions, and the spread narrows.
• Times to avoid: Midday hours (11:30-14:00 EST), liquidity decreases and the spread widens. Spreads are 5-10 times wider during pre-market and after-hours.

Trading during this time periods can reduce spread costs by 30-50%.

Use Limit Orders to Control Execution Price

Limit orders allow investors to secure a guaranteed trade at a specific price or better. Unlike market orders, you are not obligated to accept the current ask (buy) or bid (sell) price.

• Buy limit order: EUR/USD quote: 1.0850/1.0852
• Market order: You buy instantly at 1.0852 (ask)
• Limit order: If you set a limit at 1.0851, you buy when the price reaches this level (saving 1 pip)
• Sell limit order: Quote: 1.0850/1.085
• Market order: You sell instantly at 1.0850 (bid)
• Limit order: If you set a limit at 1.0851, you sell when the price reaches this level (saving 1 pip)

Advantages:

• Reduces or eliminates spread costs
• Provides price control, no slippage risk
• Allows trading near the midpoint price during periods of low volatility

Disadvantages:

• The order may not be executed (if the market doesn’t reach the limit price)
• You may miss opportunities in fast-moving markets
• Requires monitoring (readjustment if the order is not filled)

For most traders other than scalpers, limit orders are the most effective way to reduce spread costs.

Select Instruments Based on Spread Analysis

When choosing assets, not only technical or fundamental analysis but also the spread structure should be considered. Instruments with narrow spreads are more profitable, especially for short-term strategies.

Forex currency pair selection:

• Major pairs (EUR/USD, GBP/USD, USD/JPY): 0.5-1 pip spread, high liquidity, ideal for scalping and day trading.
• Minor pairs (EUR/GBP, AUD/NZD): 2-4 pip spread, medium liquidity, suitable for swing trading.
• Exotic pairs (USD/TRY, EUR/ZAR): 15-50 pip spread, low liquidity, only suitable for long-term positions.

Stock selection:

• Large cap (S&P 500 companies): 0.03-0.05% spread, daily trading volume of millions, suitable for all strategies.
• Mid-cap: 0.10-0.20% spread, medium volume, reasonable for swing and position traders.
• Small-cap: 0.50-2.00% spread, low volume, only suitable for long-term growth strategies.

Decision Criteria:

• If your trading frequency is high (5+ trades per day), choose only the instruments with the narrowest spreads
• If your trading frequency is low (1-2 trades per week), you can tolerate wider spreads.
• The target profit/spread ratio should be at least 5:1 (maximum 4 pip spread for a 20 pip target).

Reduce Position Sizing During Volatile Events

• Normal market conditions: Full position size
• Moderate volatility (economic calendar yellow indicator): 50% position reduction
• High volatility (economic calendar red indicator): 70-80% position reduction or no trading
• Geopolitical crisis: Close all positions or remain an observer

Risk management approach:

• Normal market conditions: Full position size
• Moderate volatility (economic calendar yellow indicator): 50% position reduction
• High volatility (economic calendar red indicator): 70-80% position reduction or no trading
• Geopolitical crisis: Close all positions or remain an observer

This approach optimizes both the spread cost and overall risk exposure.

Leverage Midpoint Liquidity and Smart Routing

Modern trading technologies offer price improvement strategies that go beyond the traditional bid-ask spread. Midpoint liquidity and smart order routing can reduce spread costs by 30-50%.

Midpoint liquidity strategies:

IEX D-Peg (Discretionary Peg) attempts to execute orders at the midpoint price (midpoint = (bid + ask) / 2). If the quote is 100.00/100.10, the D-Peg order will attempt to execute around 100.05, thus halving the spread cost.

Nasdaq M-ELO (Midpoint Extended Life Order) holds the order at the midpoint price and executes it when it matches the counterparty’s order. It does not guarantee instant execution but the spread cost is zero.

Intelligent order routing (SOR):

The Interactive Brokers SmartRouting algorithm scans 100+ liquidity sources (exchanges, dark pools, ECNs) and finds the best price. For example, if there’s an order at 100.05 on the NYSE, it might find an order at 100.03 on the Nasdaq, and the order will be automatically routed to the Nasdaq.

For Large Block Transactions:

In a purchase of 10,000+ shares, placing a market order in the open market pushes the price up and creates a poor average price. VWAP (Volume Weighted Average Price) algorithms break the order into smaller parts throughout the day and execute it at prices close to the market average. Spread and market impact are minimized together.

APPLICATION:

• For retail investors: Choosing a broker that offers limit orders + smart routing (IB, Fidelity)
• For medium-sized trades: Using IEX D-Peg or Nasdaq M-ELO
• For large block trades: VWAP or TWAP algorithms

These strategies optimize the true transaction cost beyond the spread.

Emerging Trends in Bid-Ask Dynamics

Algorithmic Order Routing and Spread Optimization

Algorithmic order routing continuously improves order execution quality through artificial intelligence and machine learning. Modern brokers not only search for the cheapest quote but also analyze historical trading data to determine the optimal execution strategy.

Next-generation SOR algorithms:

Access for retail distribution: Commission-free platforms like Robinhood and E*TRADE provide access to these technologies through the PFOF (Payment for Order Flow) model. Your broker receives reciprocal price analyses as they sell orders to market liberals. SEC data shows that this model provides an average price prediction of 20%.

Cryptocurrency Markets and Maker Rebates

Cryptocurrency markets offer different spread dynamics and maker-taker fee characteristics than traditional financial markets. While nominal spreads are wider, the maker discount system can significantly reduce the net cost.

Maker-taker modeli:

• Maker: The party that adds liquidity to the order book by placing limit orders; receives a rebate (discount) when the transaction is executed.
• Taker: The party that takes advantage of the available liquidity by placing market orders; pays a transaction fee.

Darkex sample fee structure:

• Maker rebate: -0.01% (rebate per transaction)
• Taker fee: +0.04%
• Nominal spread: 1-5 basis points for BTC/USDT

If you trade $100,000 as a Maker:

• Nominal spread cost: 100,000 × 0.0005 = 100,000 × 0.0005 = 50
• Maker rebate: 100,000 × 0.0001 = -100,000 × 0.0001 = -10
• Net cost: $40

The same process applies as with a taker:

The Long-Term Trend Toward Tighter Spreads

Market structure and technological advancements are leading to a sustained narrowing of spreads in the long term.

Historical data

• 1993 S&P 500 average spread: 19 basis points
• 2000 S&P 500 average spread: 12 basis points (after decimalization)
• 2010 S&P 500 average spread: 6 basis points (HFT increase)2022 S&P 500 average spread: 3 basis points (84% decrease)

Reasons for the narrowing

Do I buy at bid or ask?

In buying transactions, you always trade at the ask price. Ask is the lowest price sellers accept, and it’s the price you have to pay when you want to buy an asset from the market. The bid price, on the other hand, is the price you’ll receive when selling.

Is a higher bid or ask price better?

It depends on your position. If you want to sell an asset you hold, a high bid price is better for you because you get more money. If you want to buy an asset, a low ask price is better for you because you pay less. As an investor, you always prefer a narrow spread (a small difference between bid and ask).

What is a good bid-ask spread?

A good spread depends on the asset type and your trading strategy. For major forex pairs, spreads below 1 pip (0.5-1 pip for EUR/USD) are considered good, while for large-cap stocks, spreads below 0.05% are better. As a general rule: the spread should be less than 2% of your target profit. If you’re targeting 50 pips, a 1 pip spread is acceptable; if you’re targeting 10 pips, a spread greater than 0.5 pips will complicate your strategy.

How do I know if a spread is too wide?

The spread determines the minimum amount of movement required for your position to break even. If the spread is more than 10% of your average price movement, it’s too wide. For example, a 5-pip spread on a currency pair moving 30 pips daily creates a 17% disadvantage and is very wide. Furthermore, a spread that is more than three times wider than normal (excluding volatility events) indicates a liquidity problem and should avoid trading.

Why does the spread matter if I’m holding long term?

Even in a long-term holding strategy, the spread has a double impact: an initial cost and a cost at the time of sale. For a stock held for 10 years, a 0.10% buy spread and a 0.10% sell spread represent a total direct cost of 0.20%. With a target annual return of 10%, this translates to a 2% loss. Furthermore, recurring spread costs during portfolio rebalancing or dividend reinvestment significantly erode compound interest. Over a 20-year investment horizon, a total spread cost of 0.50% could reduce the final portfolio value by 5-8%.

Final Thoughts: Bid Prices as Your Market Quality Signal

Bid and ask prices, and the spread, are not only the cost of a transaction but also a live indicator of market health and liquidity. A narrow spread signals a deep liquidity pool, high investor confidence, and an efficient market structure. A wide spread indicates markets with high risk perception, weak liquidity, and difficult price discovery.

Investors who deeply understand this fundamental mechanism gain a cost advantage that is not immediately apparent but is crucial in the long term. Investors who account for the spread in every trade, time optimally, and use the correct order types can increase their annual returns by 1-3%. This difference, through its compounding effect, creates a critical divide in wealth accumulation over decades.

The way to stand out from the 90% group of unsuccessful investors is not just to correctly predict market direction, but to know the true cost of each trade and minimize it. The bid and ask spread is the basis of this invisible but inevitable cost, and investors who skillfully manage it gain a quiet but steady advantage.