Glossary term
Zero-Cost Collar
A zero-cost collar is an options hedge that pairs a purchased protective put with a sold covered call so the call premium roughly offsets the put cost.
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What Is a Zero-Cost Collar?
A zero-cost collar is an options strategy that protects a long stock position with a purchased put while selling a covered call to pay for some or all of the put premium. It is called zero-cost when the premium received from the call roughly offsets the cost of the put, before commissions, bid-ask spreads, taxes, and assignment effects.
The strategy creates a floor and a ceiling. The put limits downside below its strike price for the life of the option. The short call limits upside above its strike price because the investor may have to sell the shares if the call is exercised or assigned.
Key Takeaways
- A zero-cost collar combines long stock, a long protective put, and a short covered call.
- The call premium is intended to offset the put premium.
- The strategy limits downside risk but caps upside potential.
- Zero cost does not mean no tradeoff; the main cost is giving up gains above the call strike.
- Taxes, dividends, early assignment, and transaction costs can change the real economics.
Premium Logic
The simple premium goal is:
If the investor receives $3 per share for selling the call and pays $3 per share for buying the put, the option premiums roughly offset. The investor still owns the stock, remains exposed between the two strikes, and must live with the collar's boundaries until it is closed, expires, or is adjusted.
For example, an investor owns a stock at $100, buys a $90 put, and sells a $110 call. If the stock falls below $90, the put provides downside protection below that strike. If the stock rises above $110, the call caps the upside. Between $90 and $110, the stock's movement mostly drives the result.
When Investors Use It
Zero-cost collars are often used to protect concentrated stock positions, hedge unrealized gains, reduce downside exposure before a known event, or create a defined risk range without paying a large net option premium. Executives, founders, and investors with large single-stock positions may use collars when they want protection but do not want to sell immediately.
The structure can also be used in portfolio overlays, structured notes, and index hedging. The core tradeoff remains the same: protection is financed by selling away part of the upside.
What Zero Cost Leaves Out
The phrase zero cost can be misleading. The investor may avoid a net upfront premium, but the collar still has economic costs. The short call can cap a large rally. The put strike may leave meaningful downside before protection begins. Options spreads, commissions, and tax rules can reduce the cleanness of the structure.
Dividend dates and American-style options can also matter. A short call can be assigned early, especially around dividends when the option is in the money. Tax rules for collars can be technical for appreciated positions, so planning context matters.
The Bottom Line
A zero-cost collar uses call premium to finance put protection around a stock position. It can be a practical hedge, but the investor pays through capped upside, strike selection, transaction costs, assignment risk, and possible tax complexity.