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Protective Put

It's March 2025. You're holding 1 BTC at 92,000. Ethereum just got rekt on a smart contract exploit rumor, and you can feel the contagion spreading. You don't want to sell your BTC. You think long term it's going higher. But you also can't stomach a 30% drawdown.

You buy the 85,000 put for 2,400. Now your max loss is capped at 9,400 no matter what happens. BTC goes to 50k? You lose 9,400. BTC goes to 150k? You ride the whole move, minus the 2,400 you spent on insurance.

That's a protective put. Portfolio insurance with a guaranteed floor.

What You Do​

The SetupYou pay premium
Ownthe underlying asset (e.g., 1 BTC)
Buy1 put at or below current price
Max Profit
Unlimited
Max Loss
Entry - strike + prem.
Breakeven
Entry + premium
Margin
Hold underlying

How the P&L Works​

Think of it like car insurance. You pay a premium. If nothing bad happens, you're out the cost of the policy. If something bad happens, you're covered.

  1. Above breakeven. BTC rallied. The put expires worthless. You only lost the premium cost. Full upside participation.
  2. Between strike and breakeven. BTC moved up a bit or stayed flat. Your spot gains partially offset the premium, or you take a small net loss. The in-between zone.
  3. Below the strike. The floor kicks in. Every dollar BTC drops below the strike, the put gains a dollar. Your net loss locks at (entry - strike + premium). That's it. The chart goes flat.

Worked Example​

You hold 1 BTC bought at $92,000. IV is at 62% after a week of choppy price action. You buy the $85,000 put expiring in 21 days for $2,400.

BTC at Expiry
Spot P&L
Put P&L
Total P&L
$60,000
-$32,000
+$22,600
-$9,400
$80,000
-$12,000
+$2,600
-$9,400
$85,000
-$7,000
-$2,400
-$9,400
$92,000
$0
-$2,400
-$2,400
$94,400
+$2,400
-$2,400
$0
$110,000
+$18,000
-$2,400
+$15,600
$130,000
+$38,000
-$2,400
+$35,600

Below 85k, the total loss locks at -9,400. BTC could go to zero and that number doesn't change. Above 94,400, you're in profit. Everything above that is gravy.

Explore the Payoff​

Spot at Expiry$100k
$70k$130k
Put Premium Paid$3k
$1k$10k
BE $103k$0+$27k-$8k$70kK $95k$130kSpot Price at ExpiryP&L
Settlement
$100k
P&L
-3.0k
Max Loss
-$8k
Max Gain
Unlimited

When to Use​

  • You hold a position you refuse to sell but need downside protection. Maybe it's a tax lot, maybe it's conviction
  • A specific risk event is coming: ETF decision, protocol upgrade, FOMC, a major unlock schedule
  • You want protection that can't be gapped through. Stop-losses can slip. Puts can't
  • You're willing to pay the premium for the ability to sleep at night
Common Mistakes
The mistakeBuying puts after IV has already spiked from a selloff, paying 80%+ IV for insurance.
The realityProtective puts are cheapest when nobody wants them. If BTC just dropped 15% and IV went from 50% to 85%, you're buying the most expensive insurance at the worst time. The time to hedge is when it's boring. Budget 1-2% of position value per month for rolling protection.
The mistakeChoosing a strike too far OTM to 'save on premium' and ending up with a put that only protects against an apocalypse.
The realityA 10-delta put with a $70k strike when BTC is at $92k protects you against a 24% crash. Anything less than that and your 'insurance' doesn't kick in until you've already lost a quarter of your position. A 25-30 delta put (strike 7-10% below spot) is the standard hedge.
The mistakeLetting the put expire and leaving the position unhedged, then scrambling to re-hedge during the next selloff.
The realityRolling is part of the strategy. Set a calendar reminder: 5 days before expiry, roll the put to the next cycle. If you only buy puts in a panic, you'll always overpay.
💡

A protective put is a long call in disguise. Same P&L, different wrapper. The difference is you already hold the underlying.

Greeks at a Glance​

Greek
Sign
Plain English
Delta
+
Net long with a floor. Spot gives you +1.0 delta, the put subtracts 0.25-0.30. You still participate in most of the upside.
Gamma
+
The put adds positive gamma. If BTC drops hard, the put's delta increases, offsetting more of your spot losses. The floor gets firmer as it's tested.
Theta
-
You're bleeding time decay every day. A 21-day $2,400 put costs roughly $115/day in theta. That's the cost of insurance.
Vega
+
Rising IV helps you. If a crash happens, IV spikes and your put becomes more valuable right when you need it most. This is the only strategy where vega and your fears align.

Gamma protects you harder as the crash deepens. Vega amplifies the put's value right when the market is panicking. These Greeks work together in your favor during a selloff.

Related:

  • Collar, add a short call to finance the put
  • Long Put, the standalone bearish bet
  • Covered Call, income strategy on the same position
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