Collar

Cheap protection on long stock via paired call and put. Outlook: neutral. Direction: varies. Risk: defined.

A collar pairs long stock with a protective put below current price and a short call above. The short call premium finances some or all of the long put premium, so collars are often structured as zero-cost (or small net credit) hedges.

The structure caps both upside and downside. Investors use collars to protect large concentrated positions (employee stock, inheritance), or around known event risk where they want exposure but not unlimited downside.

Worked example: 100 shares acquired at $100 cost basis. Open a 90-day collar: long the $90 put at $1.50, short the $110 call at $1.50, net premium zero (a true zero-cost collar). The shares remain unhedged inside the $90-$110 range; below $90 the put protects from further losses; above $110 the short call caps the upside. Outcomes at expiration: (1) stock at $115 - the call is assigned, shares sell at $110, total return is $10 capital + $0 net premium = $1,000 gain on $10,000 cost basis, but $5/share above $110 was capped away. (2) stock at $100 - both options expire worthless, shares unchanged; the collar cost nothing and protected the position over the holding period. (3) stock at $80 - the put is exercised at $90, the call expires worthless, total realized loss is $10/share = -$1,000, far smaller than the unhedged -$2,000 loss. The trade-off is explicit: cap on upside above $110 in exchange for floor at $90.

Break-Even

Break-even = share cost basis - net credit (or + net debit). Within the collar range, P/L scales linearly with spot.

Max Profit

(Short call strike - share cost basis + net credit) x 100 x contracts at or above the short call strike.

Max Loss

(Share cost basis - long put strike - net credit) x 100 x contracts at or below the long put strike.

Risk Profile

P/L curve: flat at maximum loss below the put strike, sloping up linearly through the spot range, flat at maximum profit above the call strike. The slope of the linear region is +1.00 (full stock exposure within the collar). The shape converts unbounded long-stock P/L into a bounded range, with the boundaries chosen to express the trader's risk tolerance.

Greeks by Leg

Three-component structure. Long stock contributes +1.00 delta, zero gamma, zero theta, zero vega. Long OTM put contributes negative delta (-0.10 to -0.30), positive gamma, negative theta, positive vega. Short OTM call contributes negative delta (-0.10 to -0.30), negative gamma, positive theta, negative vega. Net: positive but reduced delta (typically +0.50 to +0.80 share-equivalent), small or near-zero gamma (the put and call gammas roughly cancel), small theta (the call decay finances the put decay), small or near-zero vega (the long-vega put and short-vega call cancel). The structure is essentially synthetic stock with capped both ends.

When to Use

• Protecting a concentrated long position (tax, inheritance, employee stock) from downside.
• Known event risk where you want defined-risk exposure but do not want to sell the shares.
• IV is elevated enough that the short-call premium meaningfully finances the long put.
• You are willing to cap upside in exchange for cheap downside protection.

IV-Rank Guidance: When to Enter

Collars are most efficient when IV rank is moderately elevated (50-70). The short-call premium is meaningful (high enough to finance the long put), and the long-put protection is reasonably priced. In low-IV-rank conditions, the short call collects too little to fund the put, and the collar becomes a small-debit trade with limited protection. In very high-IV-rank conditions, the put is expensive AND the call is expensive, so the structure is near-cost-neutral but the wide premium spreads mean small mispricing has bigger impact.

Common Pitfalls

• Capped upside: a runaway rally gets delivered back to you at the short strike.
• Early assignment on the short call near ex-dividend dates can cut off dividend capture.
• Managing a collar around a core position adds complexity at every roll.
• Tax implications of the stock/option interaction vary by jurisdiction.

Adjustments and Roll Logic

• If the stock rallies and the short call goes ITM, roll up and out: buy back the call, sell a higher-strike call at a later expiration. Captures more upside while keeping the structure intact.
• If the stock drops toward the put strike, consider rolling the put down (locking in a lower floor at less premium) or letting it run as protection.
• If the stock has rallied close to the short call strike with significant time, take partial profits by closing the entire collar (selling stock, closing both options at same time) rather than waiting for assignment.
• If approaching dividend ex-date with the short call ITM, expect potential early assignment. Either roll the call out before ex-date or close the position.

Frequently Asked Questions

Zero-cost collar: how does that work?

Choose the put and call strikes such that the put premium equals the call premium. The short call exactly funds the long put. Common choice: 5% OTM put plus 10% OTM call, or 10% OTM put plus 20% OTM call, depending on skew. Skew makes equity collars typically asymmetric (the put strike is closer to spot than the call strike) for zero cost.

How does a collar compare to selling shares and buying back later?

Selling shares triggers a taxable event; collars don't (the long stock position remains untouched). Selling delivers full cash; collars retain market exposure within the collar range. Selling has no time horizon; collars expire and need to be rolled. Collars fit "I want to protect this position but not exit" use cases; outright sales fit "I want out".

Should I use weekly or monthly collars?

Monthly is more common for core holdings: lower roll frequency, more meaningful premium, less attention. Weekly collars over-trade the position and have small premiums per cycle. The exception is during a specific event window (earnings) where a weekly collar matches the catalyst horizon.

How do I unwind a collar before expiration?

Three options: (1) close everything at once via a multi-leg "collar close" order if the platform supports it; (2) close the option legs and either keep or sell the stock; (3) roll the option legs out in time without touching the stock. The right choice depends on whether you want to keep the stock and what the option Greeks look like at the time.

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