Collar
A collar is an options strategy combining a long position in the underlying asset with a long put option (downside protection) and a short call option (upside cap), creating a range-bound payoff that limits both potential losses and gains — typically structured to reduce or eliminate the net premium cost.
Key takeaways
- A collar is often described as a 'zero-cost collar' when the premium received from selling the call exactly offsets the premium paid for the put, providing free downside protection at the cost of capping upside.
- Corporate executives and large shareholders use collars to hedge concentrated stock positions without triggering taxable events — the holding is maintained but protected within the collar range.
- The put strike defines the maximum loss; the call strike defines the maximum gain: P&L at expiration ranges between (Put Strike − Purchase Price) and (Call Strike − Purchase Price).
- Collars are equivalent to a bull spread on the underlying, and can be analytically decomposed into a protective put plus a covered call.
- Interest rate collars (combining a cap and a floor) provide a range bound on floating rate borrowing costs — paying above the floor rate and below the cap rate regardless of market rates.
Explanation
The collar strategy is a cornerstone of corporate equity hedging and concentrated position management. The payoff structure is intuitive: by owning the stock, buying a put for downside protection, and selling a call to fund the put, the investor creates a 'floor' below their position and a 'ceiling' above it, accepting bounded returns within this range. The strategy is most commonly deployed when an investor must maintain a long position (due to contractual lock-up, tax considerations, or regulatory requirements) but wants to reduce risk.
The construction of a zero-cost collar requires matching the put and call premiums. If a stock trades at $100 and the investor wants protection against a decline below $90, the investor buys a one-year $90 put (assume $5.00 premium). To eliminate the net premium cost, the investor sells a one-year $X call such that the call premium also equals $5.00. For example, a $112 call might trade at $5.00. The collar is established: long put at $90, short call at $112, net premium $0. At expiration: if the stock is below $90, the put caps the loss at $10/share ($100 − $90); if above $112, the call caps the gain at $12/share ($112 − $100); if between $90-$112, the investor holds at the market price.
Corporate executives frequently use collars to hedge concentrated positions in their employer's stock. SEC Rule 10b5-1 plans allow executives to pre-schedule trading programs to avoid insider trading concerns; collars can be implemented under such plans, providing hedging while maintaining the appearance of continued investment (since the actual shares are still held). The tax treatment of equity collars is complex: a 'put-call collar' on a long stock position may be treated as a 'constructive sale' under IRC Section 1259 if it eliminates substantially all risk of loss and opportunity for gain, triggering immediate recognition of unrealized gains.
Interest rate collars combine an interest rate cap (sets the maximum rate) and an interest rate floor (sets the minimum rate). A borrower paying floating SOFR buys a cap to limit their maximum rate and sells a floor to fund the cap. If SOFR rises above the cap strike, the cap pays; if SOFR falls below the floor strike, the borrower must pay the floor seller — they're protected from extreme rate rises but sacrifice the benefit of very low rates. The zero-cost interest rate collar structures the cap strike and floor strike such that cap premium equals floor premium, providing a free hedging range.
For options market-makers, collars represent a significant source of structured flow. Corporate hedging programs by insiders, large shareholders, and M&A participants generate predictable demand for collars, which dealers provide by taking on the opposite option positions and delta-hedging with the underlying stock. Understanding pending collar transactions in specific stocks can be informative for short-term price and volatility dynamics.
Formula
Collar P&L at expiration = max(Put Strike − S_T, min(S_T − S_0, Call Strike − S_0)); Zero-cost: Call Premium = Put Premium
Example
A technology company founder holds 2 million shares worth $50 each ($100 million total) but is under a 12-month lock-up from the IPO. Concerned about post-lock-up selling pressure and broader market risk, the founder implements a zero-cost collar: buys 20,000 put option contracts (100 shares/contract) with a $45 strike (10% downside protection) for $2.50/share premium; simultaneously sells 20,000 call option contracts with a $60 strike (20% upside cap) for $2.50/share premium. Net cost: $0. At the lock-up expiration after 12 months: if the stock is at $35, the puts limit the loss to $10M (the $5 decline from $45 is captured by the puts); if the stock is at $70, the gain is capped at $10/share ($60 − $50 = $20M gain) even though uncollared value has risen $40M. The collar provided free insurance against the worst outcomes.
Related terms
Call Option Cap Delta Diagonal Spread Equity Floor Hedging Insider Trading Interest Rate Interest Rate Cap Last Notice Day Market Risk