A good candidate for options trading is a stock that clears two separate bars. The first is the exchange's listing standard, a published specification with numbers attached, which decides whether options exist on that stock at all. The second is a liquidity test you run yourself by reading the option chain, and it decides whether those options are cheap enough to be worth trading. The first bar is the exchange's decision. The second is entirely yours.
Almost all of the useful work happens at the second bar. Every optionable US stock has already cleared the exchange's floor, so passing it distinguishes a name from nothing except the stocks that have no options at all. What separates the remaining candidates is the width of the bid-ask spread, the open interest resting at the strikes and expirations you would actually use, and whether the chain is quoted in one-cent increments or five-cent increments. Those three determine what a position costs you on the way in and on the way out.
Key Takeaways
- Two separate bars: the exchange decides which stocks have options, you decide which are worth trading.
- Listing is only the floor: 7,000,000 public shares, 2,000 holders, and 2,400,000 shares of yearly volume.
- Quote width is the real cost: penny classes quote a cent wide, others a nickel or a dime.
- Depth beats headline volume: open interest at the strikes you would actually use is what counts.
- Candidacy is not a trade: the screen narrows the universe, it never picks the position.
What a Good Candidate for Options Trading Actually Means
The definition: candidacy is a statement about an option market's plumbing, never a statement about where the stock is going.
This is worth being precise about, because the phrase invites a misreading. Calling a stock a good candidate says nothing about whether it will rise or fall, and nothing about whether you should own it. It says that if you decide to express a view on that company, the options market will let you do so at a predictable cost and let you out again without a penalty.
Three terms carry that definition, and each needs stating before the screen makes sense. The bid-ask spread is the gap between the highest amount a buyer is publicly willing to pay and the lowest a seller will accept; crossing it is the immediate, certain cost of getting a position on. Open interest is the number of contracts currently outstanding at a given strike and expiration, which is a measure of how much of a market already exists there. The minimum increment is the smallest amount by which a quote in that class is permitted to move, and it sets a hard floor under how tight the spread can possibly get.
The neighbour this concept is most often confused with is a good trade, and the two answer different questions. We will draw that contrast properly further down, because it is the distinction that causes the most expensive mistakes.
Every optionable stock has already passed the exchange's floor, which is exactly why the floor tells you so little about which names to trade.
The Listing Floor Every Optionable Stock Clears
The hard numbers: an exchange will not list options on a stock that fails a published set of size and activity guidelines.
Cboe Rule 4.3 governs which securities are approved for options trading, and the SEC filing record spells the guidelines out. As described in a 2023 Cboe rule filing with the SEC, absent exceptional circumstances an underlying security will not be selected for options transactions unless it meets each of the following, and it must additionally be an NMS stock characterized by a substantial number of outstanding shares that are widely held and actively traded.
| Requirement Under Cboe Rule 4.3 | Guideline |
|---|---|
| Shares held outside Section 16(a) reporting insiders | At least 7,000,000 |
| Holders of the underlying security | At least 2,000 |
| Trading volume, all markets, preceding 12 months | At least 2,400,000 shares |
| Issuer status | In compliance with the Exchange Act |
Read those numbers carefully and the reason they rarely bind becomes obvious. A company with 7,000,000 publicly held shares and 2,400,000 shares of annual volume is a small company by any modern measure, which means the floor screens out microcaps and little else. It is a genuine gate, and our explainer on whether you can trade options on penny stocks walks through the names that fall on the wrong side of it, but the overwhelming majority of stocks you have heard of clear it comfortably.
The floor also has a second edge that matters more than the first. Exchanges maintain continued listing standards alongside the initial ones, set out in Rule 4.4, which governs withdrawal of approval of underlying securities, and those standards sit under the entry bar rather than at it. A stock that deteriorates does not lose its options overnight. The exchange stops opening new series, which leaves the existing contracts trading to expiration while the chain quietly stops extending into new strikes and new months.
How to Pick Stocks for Options Trading: A Six-Point Screen
Where the cost actually lives: the quoting increment sets the floor under your spread, and the spread is the one cost you pay with certainty.
Under Cboe Rule 5.4, as filed with the SEC, the minimum increment for a quote depends on whether the option class participates in the Penny Interval Program. Classes in the program may be quoted in one-cent increments for series under $3.00 and five-cent increments at $3.00 and higher. Classes outside it are held to five cents and ten cents respectively. A small group of heavily traded exchange-traded products, including SPY, QQQ and IWM, is quoted in one-cent increments across the board.
| Option Class | Series Under $3.00 | Series at $3.00 or More |
|---|---|---|
| In the Penny Interval Program | $0.01 | $0.05 |
| Not in the Penny Interval Program | $0.05 | $0.10 |
| SPY, QQQ, IWM and XSP | $0.01 | $0.01 |
Work through what that difference costs. Suppose two stocks, XYZ and ABC, both trade at $100, and suppose the same contract on each carries a fair value of $3.00, which is $300 for one contract given that a standard equity option covers 100 shares of the underlying. XYZ is in the penny program, so in this case its market can sit at $2.98 bid and $3.02 offered, a four-cent spread worth $4 per contract. ABC is not, so the tightest its market may legally get is five cents wide, and in this scenario a two-tick market of $2.90 by $3.10 is common, a twenty-cent spread worth $20 per contract.
Now round-trip both. Entering and exiting each position by crossing the spread costs $8 on XYZ and $40 on ABC, against the same $300 of premium at risk. In this case that is 2.7 percent of the position on one and 13.3 percent on the other, before a single commission, and before the underlying has moved at all. The trade on ABC has to be right by a wider margin simply to arrive at breakeven, which is a handicap applied to every trade you ever place in that name.
The six points worth checking, in the order they matter:
- Quoting increment. Is the class in the Penny Interval Program? This sets the floor under everything else.
- Quoted spread at your strike. Measure it as a percentage of the mid, not in cents. Four cents on a $3.00 contract and four cents on a $0.30 contract are different animals.
- Open interest where you would trade. Not the chain total. The specific strike and expiration you intend to use.
- Strike density. Are strikes spaced a dollar apart near the money, or five dollars apart? Coarse spacing forces you into positions you did not want.
- Expiration coverage. Weeklies, monthlies, or monthlies only. This determines whether you can match a position to your actual horizon.
- Whether the market persists. A tight quote that vanishes when you send an order was never really there.
Points two and three are where most screens go wrong, because the tempting shortcut is to sort by options volume and stop. Volume counts what traded today and can be concentrated in one expiration; it is a record of the past session, not a description of the market waiting for your order. Our deeper treatment of why a tight bid-ask spread matters more than traders think makes the case at length, and the companion piece on what open interest actually tells you covers the second measurement.
A Good Underlying Is Not the Same as a Good Trade
This is the distinction the whole exercise turns on, and it is genuinely easy to lose. A screen tells you where you can trade efficiently. It has no opinion on whether you should.
- What each one measures. Candidacy measures the market's infrastructure: increments, spreads, open interest, strike coverage. Trade quality measures a specific position's risk, reward, and probability.
- How fast each one changes. Candidacy is close to a structural property of the name and changes over months. Trade quality changes with every tick and every day of decay.
- Who determines it. The exchange and the market makers set candidacy. You set trade quality by choosing a structure, a strike, and an expiration.
- What failing it costs. A name that fails the screen is excluded entirely. A trade that fails your analysis excludes one structure, in one name, today.
The practical consequence is that the two tests run in sequence and never substitute for each other. Screening first and analysing second means you only ever evaluate positions you could actually execute. Doing it the other way round is how traders end up with a thesis they cannot express, staring at a chain five strikes wide with no bids on the far side. Once you have two executable candidates, comparing them properly is a separate exercise with its own arithmetic.
There is also a failure mode in the other direction, and it is subtler. The most liquid chains in the market attract the most sophisticated participants, so a tight spread is not evidence that a position is mispriced in your favour. Liquidity lowers your cost of doing business. It does not hand you an edge.
Why the Screen Changes What You Pay
The compounding effect: a structural cost applies to every trade you place, not only to the trade you are thinking about now.
The single-trade arithmetic above understates the case, because the spread is not a one-time toll. It reappears on every entry, every exit, every roll, and every adjustment. A trader making one round trip a week in a name quoted twenty cents wide gives up multiples of what the same schedule costs in a penny-quoted name, and none of it depends on being right about direction.
Wide markets also distort the numbers you use to make decisions. A mid computed between a $2.90 bid and a $3.10 offer is an estimate, not a quote you can transact against, so every metric derived from it inherits that uncertainty. Implied volatility read off a wide market, a delta computed from it, a profit-and-loss figure marked to it: each one may be materially off, and the wider the market, the further off it may be. Our overview of implied volatility and what it actually measures assumes a quote you can trust, and in a thin chain that assumption quietly fails.
The decision this informs is a narrow one, and worth stating plainly. Screening does not tell you to buy or sell anything. It tells you which names are cheap enough to operate in, so that the analysis you do afterwards has a chance of surviving contact with the order book.
The minimum increment is a floor on how tight a market can be, never a promise about how tight it is.
Edge Cases That Break the Screen
No screen survives every situation, and these are the cases where the simple version misleads.
- Penny program membership is not permanent. The program is rebalanced on a schedule. Under the rule as filed, OCC ranks multiply listed classes by National Cleared Volume over June through November each year; classes among the 300 most active on securities under $200 are added on the first trading day of January, and classes that fall outside the 425 most active are removed on the first trading day of April. A name that screened well last year may not qualify this year.
- The increment is a floor, not a description. Being in the penny program permits a one-cent market. It does not produce one. Far-dated series, deep in-the-money strikes, and quiet sessions routinely show markets several ticks wide in classes that are perfectly eligible for penny quoting.
- Newly listed stocks arrive before their liquidity does. A recent listing can satisfy the size guidelines while its option chain is still thin, wide, and sparsely struck. The specific pathologies are covered in our piece on why options on new listings behave the way they do.
- Corporate actions create non-standard contracts. Splits, mergers, spin-offs and special dividends can produce adjusted contracts whose deliverable is no longer a round 100 shares. These often trade in their own thin market alongside the standard series, and they are easy to buy by accident.
- A halt in the underlying stops the options too. When trading in the stock is halted, its options halt with it, and a position you intended to manage becomes unmanageable until the stock reopens. Liquidity that was there an hour ago provides no protection at all.
- Approval level comes first. Screening underlyings is pointless if your account cannot trade the structure you have in mind. FINRA requires that a firm approve an account for options before it accepts options orders, and the level assigned determines which strategies are available to you.
Frequently Asked Questions
These answers cover the questions that usually come up once the screen is built: where the thresholds come from, which measurements mislead, and what happens when a stock stops clearing the bar.
