How to Read an Options Chain
Learn to navigate options chains like a pro. Understand bid/ask, volume, open interest, and how to find the best opportunities.
How to Read an Options Chain
An options chain displays all available options for a stock. Learning to read it efficiently is essential for finding good trades.
Options Chain Layout
A typical options chain shows:
| Column | What It Means |
|---|---|
| Strike | The price at which you can buy/sell |
| Bid | Price someone will pay to buy |
| Ask | Price someone wants to sell for |
| Last | Most recent trade price |
| Volume | Contracts traded today |
| Open Interest | Total outstanding contracts |
| IV | Implied volatility |
| Delta | How much price moves per $1 stock move |
Understanding Bid and Ask
The bid-ask spread is crucial for trading costs:
- Bid: The highest price a buyer will pay
- Ask: The lowest price a seller will accept
- Spread: The difference between them
Example:
- Bid: $1.45
- Ask: $1.55
- Spread: $0.10
Wide spreads (> $0.20) make it harder to get good fills. Tight spreads (< $0.05) indicate liquid options.
The Midpoint
When placing orders, use the midpoint as your starting price:
Midpoint = (Bid + Ask) / 2
Midpoint = ($1.45 + $1.55) / 2 = $1.50
Start at the midpoint and adjust if needed for faster fills.
Volume vs Open Interest
These metrics tell you about liquidity:
Volume = Contracts traded TODAY
- High volume = active trading
- Shows current interest in that strike
Open Interest = TOTAL outstanding contracts
- High OI = many positions held
- Indicates established interest
What to look for:
| Metric | Good Sign | Caution |
|---|---|---|
| Volume | > 100 | < 10 |
| Open Interest | > 500 | < 100 |
| Bid-Ask Spread | < 5% of price | > 10% of price |
Implied Volatility (IV)
IV tells you how much movement the market expects:
- High IV = Market expects big moves = Higher premiums
- Low IV = Market expects stability = Lower premiums
For sellers (wheel strategy):
- Higher IV is generally better (more premium)
- But be aware of WHY IV is high (earnings, news, etc.)
IV Rank/Percentile:
- IV Rank 80% = IV higher than 80% of the past year
- Helps you know if IV is relatively high or low
Strike Price Selection
Options are organized by strike price:
In-the-Money (ITM):
- Calls: Strike < Stock Price
- Puts: Strike > Stock Price
- Higher premium, higher delta
At-the-Money (ATM):
- Strike ≈ Stock Price
- Highest time value decay
- Delta around 0.50
Out-of-the-Money (OTM):
- Calls: Strike > Stock Price
- Puts: Strike < Stock Price
- Lower premium, lower delta
Reading the Greeks
The Greeks help predict how option prices will change:
| Greek | Measures | For Sellers |
|---|---|---|
| Delta | Price sensitivity | 0.20-0.30 is typical target |
| Theta | Time decay per day | Positive = good for you |
| Vega | Volatility sensitivity | High vega = affected by IV changes |
| Gamma | How fast delta changes | Higher near ATM |
Practical Example
Stock XYZ at $50, looking at 30-day puts:
| Strike | Bid | Ask | Vol | OI | Delta | IV |
|---|---|---|---|---|---|---|
| $52.50 | $3.80 | $4.00 | 45 | 1,200 | -0.65 | 35% |
| $50.00 | $2.15 | $2.25 | 320 | 3,500 | -0.50 | 33% |
| $47.50 | $1.05 | $1.15 | 180 | 2,100 | -0.30 | 31% |
| $45.00 | $0.45 | $0.55 | 85 | 890 | -0.18 | 30% |
Best choice for selling puts: $47.50 strike
- Reasonable premium ($1.10 midpoint = 2.3% yield)
- Good delta (0.30 = ~30% chance of assignment)
- High open interest (liquid)
- Tight spread ($0.10)
Red Flags to Avoid
- Wide bid-ask spreads - Hard to get fair prices
- Low open interest - May be hard to exit
- Very low premium - Not worth the capital
- Unusual IV spike - Check for earnings or news
- Zero volume - No one is trading it
Using Our Screener
Our options screener pre-filters for:
- Liquid options (volume and OI minimums)
- Reasonable spreads
- Calculated yields and probabilities
- IV rank indicators
This saves you from manually scanning chains for every stock.
In the next lesson, we'll cover option pricing and how intrinsic vs extrinsic value works.