Protective Puts and Collars: Paying to Cap Your Downside

Insurance has a price and the price is quotable. A put gives you the right to sell your shares at a fixed price until a fixed date, so owning one against stock you already hold converts an open ended loss into a known one, for cash paid up front. The only question worth arguing about is whether the quote is worth paying. Here it is, in dollars and then as a percentage of the position per year.

The floor, and what it costs

You own 100 shares at $80, a position of $8,000. You buy one put, strike $72, ninety one days out, at $2.00 a share.

premium paid = $2.00 x 100 = $200

cost of the position = $200 / $8,000 = 2.5% over 91 days

annualized cost = 2.5% x 365 / 91 = 10.0%

floor per share = strike - premium = $72.00 - $2.00 = $70.00

max loss = ($80.00 - $70.00) x 100 = $1,000, or 12.5% of the position

Ten percent a year. Most people never compute that figure, and it is the one that decides everything else about the trade.

The structure has a deductible. Between $80 and $72 the loss is entirely yours, all $800 of it, and the put does nothing at all in that range. Below $72 it pays dollar for dollar. At $50 the shares are worth $5,000 and the put is worth ($72 - $50) x 100 = $2,200, so the position carries $7,200 against $5,000 for an unhedged holder, and after the $200 premium you are down $1,000 on the quarter where they are down $3,000.

Above $80 you keep every cent, less the $200. That asymmetry is the whole appeal.

All of that arithmetic describes expiry. Before expiry the put moves by its delta, so a $72 put carrying a delta of -0.25 gains about $25 per contract when the stock falls a dollar, which means the position is one quarter hedged at that moment and no more. The floor is a guarantee about the final day. It is an approximation on every day before it. A sharp fall also lifts implied volatility, which lifts the put by more than delta alone predicts, and that is the one occasion when a hedge pays out better than the model said it would.

Every strike is a different deductible

Same stock at $80, same ninety one days, four strikes.

Put strike	Premium	Cost of position	Annualized	Floor per share	Worst case loss
$76	$3.40	4.25%	17.0%	$72.60	9.3%
$72	$2.00	2.50%	10.0%	$70.00	12.5%
$68	$1.10	1.38%	5.5%	$66.90	16.4%
$64	$0.55	0.69%	2.8%	$63.45	20.7%

Read the last two columns together, because they are the trade. The $76 put holds the worst case to 9.3% and charges 17% a year for it. The $64 put charges 2.8% a year and permits the position to fall more than a fifth before it does anything useful. Both of those are defensible choices for different problems.

What is indefensible is buying the $64 put, feeling protected, and then discovering in a 15% decline that the contract you own is still worthless. Cheap strikes are cheap for a reason. The premium column exists because of implied volatility, which is the one input you can shop for, and the method for telling rich from ordinary is in implied volatility explained.

The expiry decides the price per day

Short dated puts look cheap because the ticket is small. Divide by the days and they stop looking cheap. A twenty eight day $72 put at $0.90 costs $0.90 / 28 = $0.0321 per day, while the ninety one day contract at $2.00 costs $2.00 / 91 = $0.0220 per day, so rolling the monthly four times runs around 46% more per day of cover than buying the quarter outright, before four sets of commissions and four crossings of the bid-ask spread.

That gap is structural. Time value decays fastest in an option’s final weeks, which makes those weeks the most expensive ones to rent, and a programme of buying one month puts pays that premium twelve times a year.

Longer contracts flip the problem. They cost less per day and more per ticket, they tie up capital in a decision you cannot revisit for a year, and a twelve month put on a position you end up selling in March is money spent on a risk you no longer carry.

Financing the put by selling a call

A collar is the protective put with a short call attached. Same expiry, same 100 shares, one leg bought and one sold. The call premium pays for some or all of the put.

Sell the ninety one day $88 call at $1.30 against the $72 put bought at $2.00.

net cost = $2.00 - $1.30 = $0.70 per share, or $70

net cost of the position = $70 / $8,000 = 0.88%, which annualizes to 3.5%

The position now lives inside a band. Below $72 the put pays. Above $88 the call takes the gain. Between the two you simply own the stock, collect the dividends and watch the collar do nothing.

Stock at expiry	Shares worth	Put worth	Call costs	Net vs $8,000	Unhedged
$60.00	$6,000	$1,200	$0	-$870	-$2,000
$72.00	$7,200	$0	$0	-$870	-$800
$80.00	$8,000	$0	$0	-$70	$0
$88.00	$8,800	$0	$0	+$730	+$800
$100.00	$10,000	$0	-$1,200	+$730	+$2,000

Maximum loss $870, which is 10.9% of the position. Maximum gain $730, which is 9.1%. An entire quarter of possible outcomes, including the ones nobody models, has been compressed into a band twenty percent wide for an outlay of $70, and that compression is the reason collars survive on concentrated positions where nothing else does.

What the zero cost collar actually costs

Push the call strike down until its premium exactly funds the put. Suppose the $85 call fetches $2.00, matching the $72 put. Net cost zero. The confirmation shows no debit and the marketing writes itself.

Here is the bill. The band is now $72 to $85, so upside kept = ($85 - $80) / $80 = 6.25% against downside before the floor = ($80 - $72) / $80 = 10.0%. You surrendered 6.25% of upside over ninety one days to cap 10% of downside, and everything above $85 belongs to whoever bought that call.

Run one outcome. The stock finishes at $92, an unhedged holder is up ($92 - $80) x 100 = $1,200, and the collar is up ($85 - $80) x 100 = $500. Seven hundred dollars. No statement anywhere records it, no tax form reports it, and the position still closes the quarter green, which is exactly why the cost of a collar is so easy to carry for years without noticing that it is being paid at all.

Notice why the band came out lopsided. Equity options carry a persistent skew: puts below the money trade at higher implied volatilities than calls an equal distance above it, because the demand for downside protection is steady and the market charges for it. Funding a put with a call therefore means selling the call closer to the money than the put you bought, almost every time. Check a collar strike by strike before accepting that it is symmetric.

Tax and assignment wrinkles

Both legs create problems the payoff diagram never shows. Buying a put against stock you already hold can suspend the holding period of the shares under the straddle rules, so a position held for ten months before the hedge goes on may stop accruing toward the twelve months that long term capital gains treatment requires, which turns a cheap hedge into an expensive one at the moment you sell. Buying the put on the same day you buy the stock, and identifying it as such, avoids that outcome. Selling a call too deep in the money can fail the qualified covered call test and cost you qualified dividend treatment on dividends received while it is open. IRS Publication 550 is the document. The detail is intricate enough that a position large enough to hedge is large enough to justify an hour with a tax professional, and the account level questions around it sit in tax-efficient investing.

Assignment has its own edges. A short call sitting in the money before an ex-dividend date can be assigned early, which takes the shares away and leaves you holding a long put with no stock behind it, a naked bearish bet you never chose to place. Everything that happens after the bell on the third Friday is in options expiration and assignment.

One more. Exercising the put sells the shares and realizes the gain that the hedge was often built to postpone, so selling the put for cash and keeping the stock is usually the better exit. The contract is worth its intrinsic value either way.

When this is worth doing at all

For a diversified portfolio held for decades, almost never. Paying 10% a year to protect an asset you expect to compound at less than that is a decision to hold cash with extra steps, and the honest version of the argument concedes it. Protection costs what it costs because the events it protects against do happen.

Four situations change the answer:

• One holding is large enough that its drawdown would change your life, and selling it triggers a tax bill you are unwilling to pay.
• The money is committed to something dated, a house deposit or a tuition bill, falling inside the life of the contract.
• The shares are restricted or inside a lockup and cannot legally be sold yet.
• A specific event with a binary outcome lands inside the expiry you chose.

Outside those, consider the cheaper answer. Sell some. Selling 25 shares at $80 raises $2,000, removes a quarter of the downside permanently, pays no premium and needs no renewal, and it costs you a quarter of the upside forever, which is a real price and a visible one. A hedge that has to be rewritten every quarter is a position you have decided to keep alongside a decision you have decided to postpone. The premium is the fee for postponing it.

Next: covered calls, the short call leg standing on its own, where the same ceiling arithmetic applies without a floor underneath it. The options strategy builder will price a collar and a covered call against the same holding so the two ceilings can be compared side by side.