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Cash-secured put

As explained in Investing for Programmers

A cash-secured put is an options strategy that sells a put while reserving enough cash to purchase the underlying asset if assignment occurs.

A cash-secured put sells a put option while reserving enough cash to buy the underlying asset if assignment occurs. The strategy suits an investor who wants long-term exposure but considers the current share price too high: choose a lower strike, collect the premium, and potentially buy shares at that strike. section 7.4.1

The payoff depends on what happens before expiration:

  • If the share price stays above the strike, the put may expire without exercise and the seller keeps the premium. section 7.4.1
  • If the share price falls below the strike and the buyer exercises, the seller buys the stock at the agreed lower price. section 7.4.1
  • A severe company crisis can make the assigned shares worth far less than the purchase price, producing substantial losses despite the premium. section 7.4.1

A volatile stock

Suppose a volatile stock appears attractive for the long run but expensive today. Selling a put at a lower strike can provide premium income and a possible entry price below the current market. The trade still exposes the seller to a large loss if the company’s value approaches zero. section 7.4.1

How Investing for Programmers covers it

How deep it goes
Explains premiums, strikes, expiration, exercise, assignment, and downside risk through one practical scenario.
Examples
Uses a volatile stock and an Enron-collapse scenario to illustrate intended entry and catastrophic downside.
What it assumes
Assumes basic familiarity with options, puts, calls, premiums, strikes, expiration, and exercise.
What you can do after
Evaluate premium income against assignment obligations and company-specific downside risk.
How it connects
Connects put options with premiums, strike prices, expiration, exercise, assignment, and long-term stock ownership.
Cover of Investing for Programmers
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