Every option in the chain has two prices: the bid and the ask. The bid is the highest price someone is currently willing to pay for that contract. The ask is the lowest price someone is willing to sell it for. The gap between those two numbers is the bid-ask spread, and it is money that comes out of your pocket every time you trade.
If an option has a bid of $2.00 and an ask of $2.20, the spread is $0.20. You buy at $2.20 and if you wanted to sell immediately, the best you could get is $2.00. You are down $0.20 per share, or $20 per contract, the moment the trade fills. The stock has not moved. Volatility has not changed. You just paid the cost of crossing the spread.
This might sound small. On a single contract it often is. But it adds up in ways that are easy to ignore and hard to recover from.
Why options spreads are wider than stock spreads
If you trade stocks, you are used to penny-wide spreads on liquid names. Apple stock might have a bid of $175.50 and an ask of $175.51. One cent. Options on the same stock might have spreads of $0.10 to $0.50 or more, depending on the contract.
Several reasons for this.
Options are more complex instruments. A market maker quoting an option has to manage risk across delta, gamma, theta, vega, and the correlation between all of them. That risk management cost gets built into the spread. A stock market maker only has to worry about the stock going up or down. An options market maker has to worry about direction, time, volatility, and how fast all of those are changing.
There are many more contracts to quote. A single stock has one market. A stock with options might have 20 expiration dates with 30 strike prices each, meaning 600 individual call contracts and 600 put contracts, all requiring active quotes. The market maker spreads their capital and attention across all of them. Less popular contracts get wider spreads because fewer people are competing to trade them.
Lower volume per contract. Even on a very liquid stock, any individual option contract might trade only a few hundred times per day. The stock itself might trade millions of shares. Lower volume means the market maker faces more uncertainty about whether they can offload their position, so they charge a wider spread as compensation.
How the spread eats your profits
The math here is straightforward but worth spelling out because the impact compounds.
Say you buy a call at $3.00 (the ask) and the bid at the time is $2.80. The spread is $0.20. For the option to be worth $3.00 on the bid side (meaning you could sell it and break even), the option needs to gain $0.20 in value. On a $3.00 option, that is a 6.7% move just to get back to zero.
If you are trading 10 contracts, the spread cost is $200 on entry. If you also pay a $0.20 spread to exit, that is another $200. Round trip, you have given up $400 to the spread before profits or losses from the actual trade.
Now think about a trader who makes 20 round-trip options trades per month, averaging a $0.15 spread per contract and trading 5 contracts each time. That is $0.15 x 100 shares x 5 contracts x 2 (in and out) x 20 trades = $30,000 per year in spread costs alone. The option has to outperform by that amount just for the trader to break even. Most people never calculate this number.
What makes a spread narrow or wide
Several things determine how wide the bid-ask spread is on any given contract.
Liquidity is the biggest factor. The more actively traded a contract is, the tighter the spread. SPY options near the money with a few weeks to expiration might have spreads of $0.01 to $0.03. A small-cap stock with low options volume might have spreads of $0.50 or more on the same type of contract.
How close the strike is to the current stock price matters. At-the-money options generally have the tightest spreads because they attract the most trading activity. As you move further out of the money or deeper in the money, spreads tend to widen because fewer traders are interested in those strikes.
Time to expiration plays a role. Near-term options (especially weeklies) on liquid stocks tend to have tight spreads. Longer-dated options, particularly LEAPS, often have wider spreads because less capital is deployed there and fewer participants are actively trading them.
Implied volatility affects spreads. When IV is elevated, market makers face more uncertainty about where the option is headed, so they widen their quotes. Around earnings announcements or other expected volatility events, spreads often expand even on normally liquid contracts.
Time of day matters more than people realize. Spreads are typically widest at the market open (the first 15-30 minutes) and can widen again near the close. The middle of the trading day, roughly 10:30 AM to 3:00 PM Eastern, usually has the tightest spreads. If you are not in a rush, waiting past the opening chaos can save you money.
The mid price and why it matters
The mid price is simply the midpoint between the bid and the ask. If the bid is $2.00 and the ask is $2.20, the mid is $2.10. Most options analytics platforms show your profit and loss based on the mid price rather than the bid or ask.
This is both useful and a bit deceptive. Useful because the mid price is probably closer to the "true" value of the option than either the bid or ask. Deceptive because you cannot actually trade at the mid price automatically. If you place a market order to buy, you pay the ask. If you place a market order to sell, you get the bid.
Limit orders let you target the mid price or somewhere between the mid and the ask. Placing a limit order at $2.10 (the mid) when the ask is $2.20 might get filled if a seller is willing to meet you partway. Or it might sit unfilled while the market moves away from you. There is a trade-off between getting a better price and the risk of missing the trade entirely.
I generally start with a limit order near the mid and adjust if it does not fill within a reasonable time. For liquid options, you can often get filled at or near the mid. For illiquid ones, you may need to move closer to the ask to get execution.
Natural spread vs market maker manipulation
A common complaint among retail traders is that market makers are "stealing" money through wide spreads. There is a kernel of truth here, but it is more nuanced than it sounds.
Market makers provide liquidity. They stand ready to buy when you want to sell and sell when you want to buy. For this service, they charge the spread. If nobody was willing to do this, you would have no one to trade with.
The spread is not arbitrary. It reflects the cost of hedging the position the market maker takes on, the risk that the option moves against them before they can offset it, and the capital they have tied up. On a volatile stock, these costs are higher, so the spread is wider. On a stable, heavily traded stock, costs are lower, and the spread is tighter.
That said, in genuinely illiquid contracts, market makers have more pricing power. If you are the only person trying to buy a particular far-out-of-the-money call, the market maker can quote whatever they want and you have little leverage. This is another reason to stick to contracts with reasonable open interest and volume.
Spread as a percentage: a better way to think about it
The raw dollar width of the spread is less informative than the spread as a percentage of the option's price. A $0.20 spread on a $10.00 option is 2%, which is manageable. A $0.20 spread on a $0.50 option is 40%, which is brutal.
Cheap options often have the worst percentage spreads. That $0.30 far-out-of-the-money call with a bid of $0.20 and an ask of $0.40 has a 67% spread. You need the option to double in value just to break even on the round trip. The low absolute cost makes it feel accessible, but the percentage cost makes it very hard to profit from.
I use a rough guideline: if the spread is more than 10-15% of the option's price, I look for a different contract or a different approach. There are exceptions, but wide-percentage-spread contracts need to move a lot in your favor before the trade math works.
Strategies for dealing with wide spreads
Use limit orders, not market orders. This is the single most important thing. Market orders on options guarantee you pay the ask when buying and receive the bid when selling. Limit orders let you set your price and potentially split the spread.
Trade liquid underlyings. SPY, QQQ, Apple, Tesla, Amazon, Microsoft, Meta. These have tight option spreads most of the time. If you are learning, start with these names. The execution quality is noticeably better.
Stick to near-the-money strikes. The ATM and one or two strikes on either side will have the best liquidity and tightest spreads. As you move to strikes 10% or more away from the stock price, liquidity drops and spreads widen.
Avoid the first and last 30 minutes. Spreads widen during these periods. If your trade is not time-sensitive, placing it mid-day usually gets a better fill.
Check the spread before you trade. Sounds obvious, but a lot of people look at the ask price, calculate their potential profit if the option goes to some target, and never notice that the spread is eating half their edge before the trade even starts.
Consider the round-trip cost. You pay the spread to get in and you pay it again to get out. Whatever your profit target is, subtract the estimated round-trip spread cost from it. If the remaining expected profit is too thin, the trade may not be worth taking.
When the spread is telling you something
An unusually wide spread on a normally liquid contract can be a signal. If a stock that typically has $0.05 option spreads suddenly has $0.30 spreads, something is going on. Maybe a halt is about to happen. Maybe there is news pending. Maybe the market maker sees risk that you do not. Either way, a spread that is suddenly much wider than normal warrants caution.
Conversely, if you are looking at a name you do not usually trade and the spreads look tight, that is a good sign for execution quality. It means multiple market makers are competing for your order flow, which works in your favor.
Spreads and multi-leg strategies
Spread costs multiply when you trade multi-leg strategies. A vertical spread involves two contracts: you buy one option and sell another. Each leg has its own bid-ask spread. An iron condor has four legs. Each one has a spread. Your total spread cost is the sum of all of them.
If each leg has a $0.10 spread and you are trading a four-leg iron condor, your theoretical spread cost is $0.40 per share, or $40 per set of contracts. If the total credit you receive for the iron condor is $1.50, the spread cost is already eating 27% of your maximum profit.
This is one reason why multi-leg strategies work better on liquid underlyings. On SPY, each leg might have a $0.01-0.02 spread. On a mid-cap stock, each leg might be $0.10-0.20. The difference in execution quality between those two scenarios is enormous over time.
What to read next
The bid and ask columns are two of the most important parts of the options chain. Understanding how to read them in context with volume and open interest helps you evaluate liquidity before entering a trade.
For a deeper look at what determines the option price you see in those bid and ask columns, see options premium explained.
CallPutHub shows real options chain data with bid-ask spreads highlighted, so you can practice identifying which contracts offer reasonable execution costs and which ones are likely to eat your profits before the trade gets going.