Introduction to Options Trading
Everything you need to know to understand options from scratch — with real examples, visual breakdowns, and case studies.
Disclaimer: This content is for educational purposes only and does not constitute financial advice, investment advice, or trading advice. Options trading involves significant risk of loss and is not suitable for all investors. Past performance does not guarantee future results. Always do your own research and consult with a licensed financial advisor before making any investment decisions.
What Are Options?
An option is a financial contract that gives the buyer the right — but not the obligation — to buy or sell a stock at a specific price before a certain date.
The buyer pays a price called the premium to get this right. The seller collects the premium in exchange for taking on the obligation.
The agreed price at which the stock can be bought or sold. This is locked in when the contract is created.
The deadline. After this date the option expires and becomes worthless if not exercised.
The price paid by the buyer to the seller for the contract. This is the seller's income and the buyer's cost.
Key insight: Each option contract represents 100 shares of the underlying stock. So if you see a premium of $2.50, the actual cost is $2.50 x 100 = $250.
Calls vs Puts
There are only two types of options. Everything else in options trading is built on top of these two building blocks.
Call Option
The right to buy a stock at the strike price before expiration.
- + Buy a call when you think the stock will go up
- + Profit increases as stock rises above strike + premium paid
- + Max loss = premium paid (if stock stays below strike)
Put Option
The right to sell a stock at the strike price before expiration.
- + Buy a put when you think the stock will go down
- + Profit increases as stock falls below strike - premium paid
- + Max loss = premium paid (if stock stays above strike)
Remember: For every buyer there is a seller. When you buy a call or put, someone else sold it to you and collected your premium. Sellers profit when options expire worthless. This is the foundation of income strategies like selling credit spreads.
Reading an Options Chain
An options chain is a table showing all available options for a stock at different strike prices. Here's a simplified example for a stock trading at $150:
| CALLS | STRIKE | PUTS | ||||||
|---|---|---|---|---|---|---|---|---|
| Bid | Ask | Vol | OI | Bid | Ask | Vol | OI | |
| 8.20 | 8.50 | 1,245 | 15,302 | $140 | 0.35 | 0.45 | 892 | 8,451 |
| 5.10 | 5.30 | 3,567 | 22,108 | $145 | 0.80 | 0.95 | 1,456 | 12,300 |
| 2.80 | 3.00 | 8,912 | 45,600 | $150 | 2.70 | 2.90 | 7,800 | 38,200 |
| 1.20 | 1.35 | 5,234 | 31,450 | $155 | 5.00 | 5.20 | 2,100 | 18,900 |
| 0.40 | 0.55 | 2,100 | 18,700 | $160 | 8.30 | 8.60 | 987 | 11,200 |
Bid & Ask
Bid = what buyers are willing to pay. Ask = what sellers want. The difference is the spread. You buy at the ask and sell at the bid.
Volume & Open Interest
Volume = contracts traded today. Open Interest (OI) = total contracts currently open. Higher OI means more liquidity and tighter spreads.
Call: stock > strike
Put: stock < strike
Stock price ≈ strike price
Call: stock < strike
Put: stock > strike
How Options Are Priced
An option's premium has two components:
Intrinsic Value
The real, tangible value — how much the option is worth if exercised right now.
OTM options have zero intrinsic value.
Extrinsic Value (Time Value)
The speculative part — what traders pay for the possibility that the stock could move before expiration.
Extrinsic value decays as expiration approaches (time decay / theta).
Time Decay: The Seller's Edge
Every day that passes, the extrinsic value of an option decreases. This is called theta decay. It accelerates as expiration approaches.
This is why option sellers tend to favor short-dated options — they benefit from faster time decay.
Key Terms
Case Study: Buying Your First Call
Let's walk through a real example step by step.
Three Scenarios at Expiration:
Option is worth $10 ($190 - $180). Value = $10 x 100 = $1,000. Subtract the $300 cost = $700 profit (233% return).
Option is worth $2 ($182 - $180). Value = $200. Subtract the $300 cost = $100 loss. Above the strike but below break-even.
Option expires worthless ($175 < $180 strike). You lose the entire premium paid = $300 max loss. This is the worst case.
Case Study: Selling a Put for Income
This is the foundation of income-focused strategies like the Wheel.
Three Scenarios at Expiration:
Put expires worthless. You keep the entire $200 premium as pure profit. ROI = $200 / $11,500 = 1.7% return on a single trade.
You're assigned 100 shares at $115, but you collected $2 premium so your real cost basis is $113. Stock is at $114 — you're still ahead by $1/share = $100 profit.
You're assigned at $115, cost basis $113. Stock is at $100 — unrealized loss of $13/share = $1,300 loss. This is the risk of selling puts — you must be willing to own the stock.
The Wheel Strategy: If you get assigned shares, you sell covered calls against them to collect more premium, lowering your cost basis further. When shares get called away, you start again by selling puts. This cycle is called "The Wheel" — and it's one of the most popular income strategies for option sellers.
Common Mistakes Beginners Make
Buying far OTM options because they're "cheap"
A $0.10 option is cheap for a reason — it has a very low probability of being profitable. Most cheap OTM options expire worthless. Focus on probability, not price.
Ignoring time decay
If you buy an option and the stock doesn't move, you still lose money every day from theta decay. Time works against buyers and in favor of sellers.
Risking too much on a single trade
Options can expire worthless — 100% loss on that trade. Never put more than 2-5% of your account into a single position. Diversify your trades.
Not having an exit plan
Before entering any trade, know your profit target and your max loss. "I'll figure it out later" leads to emotional decisions and bigger losses.
Trading without tracking
If you don't log your trades, you can't learn from them. Track every entry, exit, and outcome. That's exactly what Tradez was built for.
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