How Wide Bid-Ask Spreads Turn Winning Trades Into Losses
How Wide Bid-Ask Spreads Turn Winning Trades Into Losses
Wide Bid-Ask Spread Traps
A wide bid-ask spread is a trap that springs on traders who aren't paying attention. You analyze a trade, place an order, and it fills at a price that seems reasonable in isolation. But when you try to exit the position, the spread is so wide that your paper gains vanish into the ether. The market moved in your favor, but the spread moved against you twice as much. This trap is particularly vicious because it's invisible—you don't see it coming, and by the time you realize you're caught, you've already entered the position.
Wide spreads arise in two scenarios: when an option is illiquid, or when market conditions become turbulent. An illiquid option on a thinly-traded stock might have a 20% spread as a matter of course. A normally-tight option can temporarily widen to 10% of the option's value during earnings announcements, before economic data releases, or during market crashes. In both cases, the spread represents a real cost to you—one that can wipe out your entire risk-reward edge on a trade.
The psychology of wide spreads is also instructive. A trader enters a position expecting to make $500. The trade moves in his favor by $800, but the spread widens to $600. Instead of closing the winning trade, he holds, hoping the spread tightens. But the spread stays wide and time decay eats into his gains. By the time he closes, he's realized only $200 of his $800 gain. The spread cost him $600, and he never even realized it was happening.
Quick definition: A wide bid-ask spread is the difference between the bid and ask prices that's unusually large relative to the option's value. Wide spreads occur in illiquid markets or during periods of high volatility. They directly reduce your profit on a trade by forcing you to pay more to enter and accept less to exit.
Key takeaways
- A spread that's 5% or less of the option's value is acceptable; spreads above 10% are a major red flag
- Wide spreads on entry are obvious; wide spreads on exit are the trap because you don't notice them until you're trapped
- Implied volatility can cause spreads to widen temporarily, even on normally-liquid options, particularly around earnings
- Trading far out-of-the-money options or longer-dated expirations exposes you to wider spreads as a structural feature
- The same option can have a 1% spread at 11 AM and a 20% spread at 3:55 PM because of shifting market conditions
- Exiting a winning trade too late because you're waiting for the spread to tighten is a costly mistake
How Wide Spreads Destroy Your Risk-Reward Ratio
Every options trade has a risk-reward ratio. You risk $500 to make $1,000, so your ratio is 1:2. But wide spreads change the math. If you pay $500 to enter (including the spread cost) and exit for only $700 (after paying the spread on exit), your actual risk-reward is closer to 1:0.4. The spread has destroyed your edge.
Consider a concrete example. A trader uses a bull call spread on a mid-cap stock. He buys the $150 call at $5.20 and sells the $155 call at $2.80, for a net debit of $2.40. His maximum profit is the distance between strikes minus the debit, or $2.60 ($5 maximum spread minus $2.40 debit). His risk-reward is $2.40 risk for $2.60 profit, almost even money.
But he's made a mistake: he used market orders on an illiquid option. The actual spreads were wider than he realized. He paid $5.40 for the long call (not $5.20) and received $2.60 for the short call (not $2.80). His actual debit was $2.80, not $2.40. Now his maximum profit is $2.20 ($2.60 maximum minus $2.80 paid), and his risk-reward is $2.80 risk for $2.20 profit. He's now risking more to make less—a losing proposition.
The spread cost him $0.40 per spread, or $40 on a single 100-share contract. If he'd checked liquidity and used limit orders, he would have paid $2.45 all-in, giving him a $2.55 maximum profit and a better risk-reward. The difference between a marginal trade and a good trade was entirely caused by the spread.
Spreads on Entry vs. Spreads on Exit
Traders often notice wide spreads at entry—the bid-ask is obviously wide and they consciously decide whether to accept it. But spreads on exit are the real trap. You might have paid a fair price to enter, but when you try to exit, the spread has widened (or tightened, depending on conditions) and you're forced to accept a worse price than you'd planned.
This is particularly true for options with event risk. Before earnings, spreads widen to protect market makers from overnight gaps. You might buy a call with a normal 1% spread before the announcement. After earnings, the spread might widen to 8% because implied volatility has spiked and uncertainty has increased. When you try to exit, you're selling into this wide spread, and your profit has been cut.
Similarly, market crashes cause spreads to widen across all options, not just the directly affected ones. Your carefully-entered trade on a stable stock is suddenly affected by a market decline thousands of miles away. Spreads double or triple, and your position's value becomes murky. Should you exit now, or hold and hope the spread tightens? This uncertainty is a real cost—it's the mental friction and stress of not knowing your true position value.
Percentage Spread as Your Filter
A simple framework for evaluating spreads is to express them as a percentage of the option's value. A spread of $0.10 on a $5.00 option is 2%, which is good. The same $0.10 spread on a $0.50 option is 20%, which is terrible. By thinking about spreads as percentages, you avoid getting tricked by small absolute numbers on cheap options.
A $0.01 spread is always good, regardless of the option's value. A $0.02 spread is acceptable on most options. A $0.05 spread is fine on liquid options but problematic on cheap options. A $0.10 spread should alarm you if it represents more than 5% of the option's value.
The rule: avoid any option where the spread is wider than 5% of the option's bid price. This is your hard cutoff. Between 5% and 10%, the trade is marginal—you can do it if your edge is large, but it's risky. Above 10%, avoid it completely.
For example, an option bidding at $0.50 with a $0.05 spread (asking $0.55) has a 10% spread. This is the maximum you should accept on most trades. The same option bidding at $1.00 with a $0.05 spread is only 5%. The percentage spread, not the absolute spread, is your guide.
The Time-of-Day Trap
Spreads widen dramatically in the last hour of trading (3 PM to 4 PM ET). Traders are closing positions and reducing risk. Market makers are less willing to hold options overnight. Volume dries up. If you enter a trade at 3:30 PM, you're paying near-worst-case spreads. If you exit at 3:30 PM, you're receiving near-worst-case bids.
Professional traders avoid trading during the last 30 minutes of the day on options. They also avoid the first 10 minutes (9:30 AM to 9:40 AM) when spreads are often wider than normal as market makers adjust to overnight gaps. The sweet spot is 10 AM to 3 PM ET, when spreads are tightest and volume is highest.
If you're a day trader, this matters less because you're closing positions within hours. But if you're a swing trader or longer-term trader, entering during peak liquidity (11 AM to 2 PM ET) and exiting during peak liquidity is a real edge. You'll save 20-50% on spread costs compared to trading during the edges of the day.
Spread Width Across Strike Prices and Expirations
Real-World Examples
Example 1: A trader is analyzing earnings options on a pharmaceutical company. The stock is $80 and he wants to buy the $85 call expiring in 3 days (right after earnings). The bid-ask is $0.70 to $1.10—a 57% spread on the bid price. He avoids it. Instead, he buys the $85 call expiring 10 days after earnings (4 weeks out). The bid-ask is $1.50 to $1.70, a 13% spread. He accepts this and enters. When he exits a week later after earnings pass, the spread has tightened to $1.48 to $1.52 (2% spread) because the earnings uncertainty is gone.
Example 2: A trader runs a calendar spread on Tesla. She buys the far-term call and sells the near-term call. On the near-term call, she sells at a tight 1% spread. But on the far-term call, the spread is 8% because far-term options are less liquid. Her all-in spread on the calendar is wider than expected, reducing her credit. If she'd checked both spreads before entering, she would have waited for better conditions.
Example 3: A trader enters a protective put spread at 3 PM. The spreads are wider than normal because it's near market close. He pays $0.15 more on entry than he would have at 11 AM. Three hours later (next trading day), the market has moved slightly against him, and the trade is a small loser. If he'd entered at 11 AM with tighter spreads, that same move would have been breakeven or small winner. The spread cost him the entire trade.
Common Mistakes
Mistake 1: Not calculating the spread percentage before entering. You see an option at $2.50 with a $0.25 spread and think "that's only $0.25." But it's a 10% spread on the bid price. Calculate the percentage. If it's above 5%, have a strong reason for accepting it.
Mistake 2: Entering when spreads are wide and assuming they'll tighten before your exit. Wide spreads are usually wide for a reason—lack of liquidity or high uncertainty. Assuming they'll tighten is wishful thinking. They might stay wide until expiration.
Mistake 3: Trading options with event risk (earnings, FDA decisions, economic data) without accounting for the spread spike. Before earnings, spreads widen 50-100%. Include this in your analysis. If your profit target is only $100 and the spread can eat $500, your trade doesn't work.
Mistake 4: Comparing spreads across different expirations or strikes without thinking about their relative sizes. A $0.20 spread looks worse than a $0.10 spread, but if the first is on a $4 option (5%) and the second is on a $1 option (10%), the second is actually worse. Always use percentages.
Mistake 5: Focusing only on entry spreads and ignoring exit spreads. Your entry might have been perfect, but if you exit during low-liquidity hours or in a volatile market, the spread is different. Always assume you'll exit in worse conditions than you entered.
FAQ
How do I know if a spread will widen after I enter?
You can't predict it perfectly, but certain events make spreads widen predictably: earnings announcements, economic data releases, market gap-ups or gap-downs, and stock halts. Avoid trading options shortly before these events unless your profit target is very large.
Can I predict spread width from stock price and volume alone?
Not perfectly, but as a rough guide: stocks with high volume and tight stock bid-ask spreads (pennies) usually have tight option spreads too. Stocks with wide stock spreads (nickels or dimes) usually have wide option spreads.
If I'm a long-term holder, do wide spreads matter?
Yes, even more so. If you hold for months, the spread you pay on entry is locked in as a cost. You can't quickly exit to minimize spread damage. Be even more selective about spread widths for longer-term positions.
What's the best time to enter a trade to get the tightest spread?
10:30 AM to 2 PM ET, Monday through Thursday. Friday afternoons have lower liquidity. Avoid before 10 AM and after 3 PM.
How do I know if an option's spread is wide due to the underlying or due to low interest?
Check the stock's bid-ask spread. If the stock is trading tight (penny spread), and the option has a dime spread, it's likely due to low option interest. If both are wide, the whole market is turbulent.
Should I avoid all options with spreads above 5%?
Not necessarily, but you need a larger profit target. If your edge is worth $500 and the spread might cost $100, you can accept a 5% spread. If your edge is only $100, you can't afford a 5% spread.
Can I negotiate a better spread with my broker?
Retail brokers don't usually negotiate spreads—you get the market maker's quote. Institutional traders with large accounts sometimes get preferential routing. For retail, your only option is to use limit orders and patience.
Related concepts
- Paying Too Much on the Bid-Ask Spread
- Not Checking Option Liquidity
- Using Market Orders on Options
- Not Planning for Earnings Risk
Summary
Wide bid-ask spreads are a trap that turns winning analysis into losing trades through execution friction. By checking spread percentages before entering, avoiding wide-spread expirations and strikes, and trading during peak liquidity hours, you can avoid the worst cases. The discipline of accepting that sometimes the spread is too wide and you shouldn't trade is one of the hallmarks of professional trading.