🗓️ 02112025 2345
📎
Core Concept: Options expire on a specific date, forcing settlement through exercise, assignment, or worthless expiry.
Why It Matters
Expiration determines when you must act. Mismanaging expiration leads to unwanted stock positions or total loss.
When to Use
✅ Manage expiration when:
- ITM options may be assigned
- Rolling positions before expiry
- Avoiding exercise on illiquid options
- Planning exits before final week
❌ Don't:
- Hold through expiration expecting extension
- Ignore ITM short options (assignment risk)
- Trade 0DTE without understanding gamma risk
Expiration Types
Standard monthly: Third Friday of month (most liquid)
Weekly: Every Friday (higher theta, more volatile)
Quarterly: End of March, June, Sept, Dec (LEAPS)
Expiration time: 4pm ET on expiration date
Exercise deadline: 5:30pm ET (varies by broker)
Settlement Outcomes
ITM options: Usually auto-exercised (>$0.01 intrinsic)
OTM options: Expire worthless
Short options: May be assigned if counterparty exercises
Trade-offs
Pros: Forces discipline, creates opportunities (theta decay sellers win)
Cons: Time pressure, forced decisions, assignment risk
Expiration connects to options_greeks through theta acceleration and options_basics for exercise mechanics.
Quick Reference
| Days to Expiration | Theta Behavior | Strategy |
|---|---|---|
| 90+ DTE | Slow decay | Buy options here |
| 45-60 DTE | Moderate decay | Optimal entry for most |
| 30-45 DTE | Accelerating | Sell options here |
| < 30 DTE | Rapid decay | Avoid buying |
| < 7 DTE | Extreme decay | Close or roll positions |
| 0 DTE | Max gamma risk | Expert only |
Assignment risk: ITM options may be assigned early if:
- Deep ITM (>$5 intrinsic)
- Ex-dividend date approaching
- Hard-to-borrow stock
Auto-exercise threshold: Most brokers exercise if >$0.01 ITM at expiration
Examples
Theta decay timeline:
90 DTE: $100 call worth $8.00
- Daily decay: ~$0.05/day
- Weekly decay: ~$0.35
45 DTE: Same call now $5.00
- Daily decay: ~$0.10/day
- Weekly decay: ~$0.70
15 DTE: Call now $2.00
- Daily decay: ~$0.15/day
- Weekly decay: ~$1.05
3 DTE: Call at $0.50
- Daily decay: ~$0.15-0.20/day (most lost)
Assignment scenario:
You sold: SPY 450 Put, stock at $448 (ITM)
Expiration Friday:
Option 1: Close position Thursday
- Buy back put for $2.00 loss
- Avoid assignment
Option 2: Let expire
- Assigned 100 shares at $450 = $45,000 commitment
- Stock worth $44,800
- Now holding stock (may not want)
Rolling to avoid expiration:
Position: Long AAPL 180 Call, 7 DTE, stock at $185 Current value: $6.00
Option 1: Take profit
- Sell at $6.00, realize $600 gain
Option 2: Roll out
- Sell 180 Call (7 DTE) for $6.00
- Buy 180 Call (37 DTE) for $8.00
- Net cost: $2.00 to extend 30 days
0DTE gamma risk:
SPY at $450, 0DTE 450 Call at $0.50
- Delta: 0.50, Gamma: 0.80 (extreme)
SPY moves to $451 (+$1):
- Delta jumps to 0.90 (gamma effect)
- Option now $1.50 (3x gain)
SPY moves to $449 (-$1):
- Delta drops to 0.10
- Option now $0.05 (90% loss)
0DTE options have explosive gamma - extreme winners or losers. ```
References
- CBOE Expiration Calendar
- "The Option Trader's Hedge Fund" by Mark Sebastian