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Stock options trading basics

Stock options trading basics are the core ideas behind buying and selling option contracts on shares of stock. An option is a derivative, since its value depends on another asset.[1] This page is general education, not financial, tax, or legal advice. Options involve risk and can lose money. Consider speaking with a licensed professional before trading.

What an option contract is

An option gives its owner the right, but not the obligation, to buy or sell an asset at a fixed price on or before a set date.[1] A stock option has four basic parts.

  • Strike price. The fixed price for the shares.
  • Expiration. The last date the contract is valid.
  • Premium. The price per share the buyer pays the seller up front. It is not refundable.
  • Multiplier. One standard contract generally covers 100 shares.[1]

An American style option may be exercised at any time before expiration. A European style option may be exercised only at expiration. Most stock options are American style, and index options are generally European style.[2]

The Options Clearing Corporation, or OCC, is a clearing house that acts as a guarantor between clearing parties for exchange listed options.[1][3]

Calls and puts

A call gives the buyer the right to buy shares at the strike price. A put gives the buyer the right to sell shares at the strike price. The seller, or writer, takes the matching obligation if the buyer exercises.[1]

This is an illustration with made-up numbers for a hypothetical stock, XYZ, priced at $50.

  • Call. A buyer pays $2 per share for a call with a $55 strike, or $200 per contract. If XYZ ends at $60, the option is worth $500, or $300 before fees. At $55 or lower, the call expires worthless and the $200 is lost.
  • Put. A buyer pays $1.50 per share for a put with a $45 strike, or $150 per contract. If XYZ ends at $40, the option is worth $500, or $350 before fees. At $45 or higher, the put expires worthless and the $150 is lost.

Buyers and sellers

The two sides face very different risks. A buyer can lose the entire premium, but no more.[1] Time works against the buyer, since option value shrinks as expiration nears, an effect called time decay.[4]

A seller collects the premium but takes on an obligation. Some contracts can expose writers to unlimited potential losses.[1]

A covered call is backed by shares the writer already owns, and the strike price caps the upside because the shares may be called away.[5] A cash secured put is backed by cash set aside to buy the shares at the strike price.[6] Covered does not mean safe, since the stock can still fall.

The Greeks in brief

The Greeks measure how an option price responds to changes.[4] Delta estimates how much the option price moves when the stock moves by $1. Theta estimates the value lost as time passes.

Covered call funds

An exchange-traded fund, or ETF, is a pooled fund whose shares trade on an exchange. Some use covered call strategies.[7]

  • QYLD and XYLD. Global X says QYLD buys the stocks in the Nasdaq 100 Index and writes call options on that index.[8] XYLD does the same with the S&P 500 Index.[9]
  • JEPI and JEPQ. J.P. Morgan describes each as an equity portfolio plus written out-of-the-money calls, on the S&P 500 Index for JEPI and the Nasdaq 100 Index for JEPQ, and says holders may forgo part of the upside.[10][11]
  • DIVO. Amplify describes dividend stocks plus a tactical covered call strategy on individual stocks.[12]
  • YieldMax funds. These single stock funds do not provide direct exposure to the stock, and YieldMax says selling calls limits participation in price gains.[13]

Distributions can include return of capital, which may reduce the value of a share over time.[8][13] Rates change, and a rate is not a total return or a promise of future payments.[12][13] Upside is capped, and a fund can lose value in a falling market.[12] No fund is recommended here.

Options and Rule #1

Ideas are tied to sources and dates. The last paragraph is commentary.

Phil Town wrote Rule #1 (Crown Business, 2006). The publisher says its first rule is not to lose money.[14] A 2006 Motley Fool review says the thesis is to buy a wonderful business at an attractive price, checked with the Four Ms: meaning, moat, management, and margin of safety. Margin of safety means buying at a steep discount to estimated value, which the author calls the sticker price.[15] The author's website lists five moat measures, the Big Five, each at 10 percent or more per year: return on invested capital, sales, earnings per share, book value per share, and free cash flow.[16]

The review says one chapter covers technical analysis tools for trading in and out of stocks, and a 2010 summary names them as moving averages, MACD, and stochastics. Neither describes options.[15][17]

Later pages on the author website describe selling cash secured puts at a target price set after the Four Ms analysis, called getting paid while you wait, and selling covered calls to exit.[18][19] The August page says the book Payback Time covers the approach, but the 2010 publisher description does not mention options.[20]

General commentary. A rule of not losing money does not remove option risk. A cash secured put still carries downside if the stock falls well below the strike, since the writer must buy at the strike.[6] A covered call caps upside while the shares stay exposed to falls. A strike drawn from a value estimate is only as sound as the estimate.

Risks and limits

Options can expire worthless. Uncovered selling can lead to very large losses, and covered strategies still carry the risk of owning the stock.

Brokers require approval before a customer can trade options. They ask about experience and finances, then grant trading levels.[21] The OCC publishes a standard reading, Characteristics and Risks of Standardized Options. Brokers must provide it.

Discussion questions

  • Why does a buyer face a limited loss while a seller of an uncovered call may not?
  • What does a covered call give up in return for premium?
  • How could a rule of not losing money shape the choice of a put strike, and what risk would remain?

Essay ideas

  • Explain why a high distribution rate does not describe the total return of a fund.

AI prompt ideas

  • Explain calls and puts in plain language, then quiz me with five questions using made-up numbers.
  • Help me write a list of questions to ask before using options, and ask me questions where my list is vague.

Readings from Wikipedia

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 An Introduction to Options, Investor Bulletin, SEC Investor.gov
  2. ↑ Option style, Wikipedia
  3. ↑ Options Clearing Corporation, Wikipedia
  4. ↑ 4.0 4.1 Greeks (finance), Wikipedia
  5. ↑ Covered option, Wikipedia
  6. ↑ 6.0 6.1 Cash-Secured Put, Options Industry Council
  7. ↑ Exchange-traded fund, Wikipedia
  8. ↑ 8.0 8.1 QYLD, Global X ETFs
  9. ↑ XYLD, Global X ETFs
  10. ↑ JPMorgan Equity Premium Income ETF Fund Story, J.P. Morgan Asset Management
  11. ↑ JPMorgan Nasdaq Equity Premium Income ETF Fund Story, J.P. Morgan Asset Management
  12. ↑ 12.0 12.1 12.2 DIVO, Amplify ETFs
  13. ↑ 13.0 13.1 13.2 YieldMax ETFs
  14. ↑ Phil Town, Rule #1: The Simple Strategy for Successful Investing in Only 15 Minutes a Week!, Crown Business, 2006, ISBN 0307336131. Publisher page for the 2007 paperback, Penguin Random House. Edition list for the 2006 hardcover, Goodreads.
  15. ↑ 15.0 15.1 Foolish Book Review: Rule #1, The Motley Fool, August 28, 2006
  16. ↑ Essential Financial Terms, Rule One Investing, March 17, 2025
  17. ↑ The Stockpiling Approach to Stock Trading, Computerized Investing, American Association of Individual Investors, April 2010
  18. ↑ Options Trading for Income, Rule One Investing, April 16, 2026
  19. ↑ Options Trading for Value Investors, Rule One Investing, August 19, 2026
  20. ↑ Payback Time, Penguin Random House, published March 2, 2010
  21. ↑ Opening an Options Account, Investor Bulletin, SEC Investor.gov
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