What Is the Bid-Ask Spread in Options?

Many beginners focus on whether they are bullish or bearish, but trade execution matters too. One of the easiest ways to lose money unnecessarily in options is to ignore the bid-ask spread.

The bid-ask spread is the gap between what buyers are currently willing to pay and what sellers are currently asking for an option contract. It may look small on screen, but it can have a real effect on your results.

What Is the Bid-Ask Spread?

The bid is the highest price a buyer is currently willing to pay for an option.

The ask is the lowest price a seller is currently willing to accept.

The difference between those two prices is the bid-ask spread.

For example, if an option has a bid of $2.00 and an ask of $2.20, the spread is $0.20.

Since one standard options contract usually controls 100 shares, that $0.20 spread represents about $20 per contract.

Why the Bid-Ask Spread Matters in Options Trading

The spread matters because it affects the price you may realistically get when entering or exiting a trade.

If you buy near the ask and then immediately sell near the bid, you would usually lose money right away because of the spread alone, even if the option's value did not otherwise change.

That is why a trade can look fine in theory but still be less attractive in practice if execution is poor.

This issue is closely related to liquidity, volume, and open interest. Options with more activity often have tighter spreads, while less active contracts may be more expensive to trade.

A Simple Bid-Ask Spread Example

Imagine you want to buy one call option.

If the bid is $1.80 and the ask is $2.20, the spread is $0.40. If you use a marketable order, you may pay something close to $2.20.

If you later need to sell quickly and the option is still quoted around the same prices, you may only get something close to $1.80.

That is a difference of about $40 per contract before considering commissions or any change in the option's actual value.

For a beginner using small position sizes, that can be a meaningful drag on performance.

Why Some Options Have Wide Spreads

Not all options trade with the same level of activity. Spreads are often wider when:

• the option has low trading volume

• open interest is light

• the underlying stock or ETF is less liquid

• the strike price or expiration date is less popular

• markets are volatile or moving quickly

Far out-of-the-money strikes, deep in-the-money contracts, or longer-dated expirations may sometimes show wider spreads than the most actively traded options.

How Beginners Can Trade Around the Spread

Beginners do not need to avoid every option with a spread, because every traded option has one. But they should be cautious with contracts that have unusually wide spreads.

Helpful habits include:

• checking the spread before placing the trade

• favoring more liquid underlyings and actively traded strikes when possible

• using limit orders instead of automatically accepting the ask or bid

• looking at whether a fill closer to the midpoint is realistic

• remembering that a low-priced option can still be expensive to trade if the spread is wide

A midpoint is simply the price halfway between the bid and ask. It is not guaranteed, but it can be a useful reference point when deciding whether the quoted market looks reasonable.

Common Beginner Mistakes

• Looking only at the premium: An option may look cheap, but a wide spread can make it costly to enter and exit.

• Using market orders too casually: In fast or illiquid markets, a market order can lead to a worse fill than expected.

• Assuming every listed contract is equally tradable: Some strikes and expirations have much better liquidity than others.

• Ignoring spreads in multi-leg trades: Poor fills on each leg can add up and materially change the trade.

Final Takeaway

The bid-ask spread is the difference between the best current buy price and the best current sell price for an option. It may seem minor, but it directly affects execution quality.

If you are new to options, checking the spread should become a basic habit. A reasonable strategy can still turn into a disappointing trade if you overpay to enter or accept too little to exit.