Chapter 4 — Insurance for Your Stock Positions
A protective put is when you <strong>own shares of stock</strong> and buy a put option to protect yourself against a price drop. You are paying a premium — like an insurance premium — to set a floor under your position. If the stock falls, your put gains value and offsets the loss. If the stock rises, you still participate fully — you just paid for the insurance that wasn’t needed.
Think of it like earthquake insurance on a house you own. You pay a yearly premium. The house appreciates — you keep the gain. The house shakes — the insurance pays out. You never lose more than your floor, and you never give up your upside.
Protective puts are used by investors who want to hold a stock long-term but worry about a near-term drop — especially before earnings, major news events, or economic announcements. They are also popular as a hedge during market uncertainty, or when an investor has a large unrealized gain and wants to lock it in without actually selling the shares.
A farmer locks in a floor price for their crop before harvest season. They are not trying to profit from a price rally — they are protecting against a weather disaster. The hedge costs money but removes the catastrophic downside.
The put strike price is your floor — the lowest price at which you are guaranteed to be able to sell your shares. If the stock falls below that strike, the put is in the money and the gains on the put offset your stock losses. You can hold through the drop knowing your downside is capped. Your actual max loss is: (stock purchase price − put strike) + premium paid.
You bought a concert ticket for $80 and also bought a refund insurance policy for $5. Even if the concert gets cancelled and the ticket is worth $0, you get your $80 back minus the $5 you paid. Your downside is capped.
| Component | Value |
|---|---|
| Put strike (floor) | The price below which you are protected — your guaranteed exit price |
| Premium paid | The cost of the insurance — paid upfront when you buy the put |
| Max loss | (Purchase price − strike) + premium. The worst possible outcome is known before you enter. |
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A protective put is not free. You pay a premium upfront, and that premium erodes over time just like any option. Buying a put 30 days out is cheaper than buying one 90 days out — but it also decays faster and offers less protection window. The cost of the hedge must be weighed against how much you are protecting and how likely you think a drop is.
Car insurance costs more for a brand-new sports car than a used sedan. The more you are protecting, the more the insurance costs. But skipping it means risking the whole value.
A common question: why not just sell the stock instead of buying a put? Two reasons. First, selling triggers a taxable event — if you have a large gain, a put lets you defer that tax bill. Second, selling means you miss any upside that happens before the event. A protective put keeps you in the game. The premium is the price of that optionality.
You could cancel your vacation and get a full refund. Or you could buy travel insurance, stay on the trip, and know you are covered if something goes wrong. The insurance costs money but preserves the upside.
You own 100 shares of XYZ at $100/share ($10,000 position). You are worried about earnings next week, so you buy a $95 put for $1.50/share ($150 total premium). Your floor is $95 − $1.50 = $93.50 per share, or $9,350 total value on your shares. If XYZ drops to $90, your stock is worth $9,000. Your put is worth $5/share ($500) because you can sell at $95. Net: $9,000 + $500 = $9,500. You lost $500 instead of $1,000. If XYZ jumps to $110, your stock is worth $11,000 and you just paid $150 for protection you did not need. That is the trade-off.
If the event you were hedging against passes and the stock is still in good shape, you can let the put expire or close it for a profit. If you want continued protection, you can roll the put — buy a new put with a later expiration at a new strike. Rolling costs money (you buy new premium) but extends the protection window. As the stock rises, some traders raise their floor by selling a covered call at the same time — converting the position into a collar.
Your car insurance term ends. You renew it — you pay another premium. If the car is worth more now, you might raise the coverage. Same logic applies to rolling protective puts.
Imagine you own 100 shares of ABC trading at $80. You expect a FDA drug approval decision in 30 days. You want protection but are not sure it is worth the cost. Scenario: you buy a $75 put for $1.00/share ($100 premium). At expiration, ABC is at $60. Without the put, you lost $2,000. With the put: your stock lost $2,000, your put gained $1,400 ($75 − $60 × 100), net loss is $600. You still lost money, but $600 is far better than $2,000. The hedge did its job.
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