Protective Puts: Insurance for Stock You Already Own
Beginner · 6 min read · Updated April 2026
If you own 100 shares of a stock and would sleep better knowing the downside is capped, a protective put is the cleanest insurance policy options give you. You pay a premium, set a floor price, and keep all the upside above it. Here's how it works, when it's worth the cost, and when a collar is the smarter move.
The one-line version
Own 100 shares. Buy one put option on the same stock. If the stock crashes, the put gains value and offsets the loss. If the stock rises, the put expires worthless and you lose only the premium. It’s exactly like buying insurance on a car: small regular cost, protection against the big loss.
A real AAPL example
You own 100 shares of AAPL at $180 — a $18,000 position. You buy the $170 put expiring in 60 days for $3.00 per share ($300 total).
Insurance: $170 put, 60 DTE, $3.00 premium = $300
Max loss = ($180 − $170) × 100 + $300 = $1,300
(a 7.2% ceiling on losses)
Breakeven on upside: $183
Upside above $183: unlimited
Insurance cost as % of position: 1.67%
Three outcomes at expiration
AAPL rallies to $200
Stock gains $2,000. Put expires worthless. Net: +$1,700 after the $300 insurance cost.
AAPL stays near $180
Stock is flat. Put expires worthless. You paid $300 for insurance you didn't need — same cost as home insurance you don't claim.
AAPL crashes to $150
Stock loses $3,000. Put gains ~$2,700 ($20 intrinsic × 100 minus premium paid). Net loss capped at max.
When a protective put makes sense
Use it when…
- ✓You have an unrealized gain you don't want to sell for tax reasons
- ✓Earnings or binary event is 1-2 weeks away and you want overnight-gap protection
- ✓Concentrated position (RSUs, single stock >20% of portfolio)
- ✓Fed meeting, election, or known macro catalyst approaching
Avoid it when…
- ✗You'd just sell the stock if it dropped — skip the insurance, sell some now
- ✗You're hedging permanently (10-20% annual drag)
- ✗Position is small — under $10K, commissions + premium make it uneconomic
- ✗IV is very high after a crash — you're buying insurance after the fire
The cost-basis math
Buying the put raises your effective cost basis on the position. You paid $180 for shares + $3 for the put = $183 breakeven. Any sale above $183 is profitable; below is a loss. Treat it the same as paying for an umbrella policy on your house — you hope it’s wasted.
Picking the right strike
- Deep out-of-the-money (20% below spot): cheap premium, protects only against a crash. Best for black-swan hedging.
- Mild out-of-the-money (5-10% below spot): moderate premium, most common protective-put setup. The AAPL $170 example above.
- At-the-money: expensive premium, near-complete protection from first dollar of loss. Rarely worth it outside of binary-event hedging.
The collar — a smarter alternative
If you want downside protection but don’t want to pay the premium, sell a covered call above the stock to finance the put. The collar caps your upside at the call strike but often zeros out the net insurance cost.
Buy $170 put for $3.00 (−$300)
Sell $190 call for $2.50 (+$250)
Net insurance cost: $50 (0.3% of position)
Upside capped at $190. Downside floor at $170.
The trade-off: you gave up $10 of upside to get $20 of downside protection for almost free. For anyone genuinely worried about a drop, the collar almost always beats a naked protective put.
Other alternatives worth considering
- Stop-loss order — free, but doesn’t protect against overnight gaps. If the stock opens down 20%, you sell at the gap price, not your stop.
- Sell some stock — if you’re worried, reducing position size is the cheapest hedge. Don’t over-engineer what a 20% sell order solves.
- Cash-secured put below market — if you’d buy more on a dip, get paid to wait (CSP) instead of paying for insurance (protective put).
Common questions
What is a protective put?
A protective put is an insurance trade: you own 100 shares of a stock and buy one put option on the same stock. The put gains value if the stock drops, offsetting your losses. You keep all the upside if the stock rises — minus the premium paid.
Is buying puts every month expensive?
Yes — rolling protective puts continuously is a 10-20% annual drag on most stocks. Use them tactically around specific events (earnings, Fed meetings) rather than as permanent insurance. A collar is usually a better structure for permanent protection.
What's the difference between a protective put and a collar?
A protective put is just the long-put insurance leg. A collar adds a short call above the stock price — you sell upside to finance the put, often making the total hedge free. Collars cap gains but can zero out the insurance cost entirely.
Keep learning
Ready to apply what you’ve learned?
Alpha Copilot turns any ticker into a real setup, ranked by probability of profit — with live data and plain-English explanations.
Try Alpha Copilot — freeNo credit card required