If you sell a straddle, you have two short options that can be assigned at any time. Understanding when assignment happens and what it means for your position helps you avoid surprises and manage the risk properly.

What Is Assignment?

When you sell an option, the buyer has the right to exercise it. If they do, you're assigned — forced to fulfill the contract:

  • Short call assigned: You must sell 100 shares at the strike price
  • Short put assigned: You must buy 100 shares at the strike price

    • For a short straddle (short call + short put at the same strike), you could be assigned on either leg or, in rare cases, both.

    When Does Assignment Happen?

    At Expiration

    Any option that's $0.01 or more in the money at expiration is automatically exercised by the OCC. This is the most common assignment scenario.

    If you have a short $100 straddle and the stock closes at $103:

  • The $100 call is ITM → you're assigned → you sell 100 shares at $100
  • The $100 put is OTM → expires worthless

    • Before Expiration (Early Assignment)

    American-style options can be exercised any time before expiration. Early assignment typically happens when:

    1. The option is deep in the money. When extrinsic value is nearly zero, the option holder may exercise rather than sell the option.

    2. A dividend is approaching. Call holders sometimes exercise early to capture the dividend. This is most likely when:

  • The call is ITM
  • The dividend exceeds the remaining extrinsic value of the call
  • The ex-dividend date is within 1-2 days

    • 3. Near expiration. As expiration approaches and extrinsic value shrinks, early assignment probability increases.

    Assignment Scenarios for Short Straddles

    Scenario 1: Call Assigned (Stock Above Strike)

    You're short the $100 call and put. Stock is at $108.

    If the call is assigned:

  • You sell 100 shares at $100 (you're now short 100 shares)
  • You still have the short $100 put open

    • Your position is now: Short 100 shares + Short 1 put = Covered put

    This is a bearish position. If the stock continues rising, your short stock loses money but the put decays (small consolation). If the stock drops, the short stock profits.

    Scenario 2: Put Assigned (Stock Below Strike)

    Stock drops to $92. The put is assigned.

  • You buy 100 shares at $100 (you're now long 100 shares at $100, which are worth $92)
  • You still have the short $100 call open

    • Your position is now: Long 100 shares + Short 1 call = Covered call

    This is a moderately bullish position. If the stock rebounds, both the stock and the call assignment work in your favor.

    Scenario 3: Both Assigned (Rare)

    Theoretically possible but extremely rare. Both the call and put would need to be ITM at the same time — which is impossible at the same strike. The only scenario: one is assigned early and the stock reverses before the other is assigned at expiration.

    Managing Assignment Risk

    1. Monitor ITM options near expiration. If either leg is ITM in the last week, prepare for assignment. Close the position if you don't want the stock exposure.

    2. Watch for dividends. If the underlying pays a dividend and your short call is ITM, check whether the dividend exceeds the call's remaining extrinsic value. If it does, early assignment is likely.

    3. Close before expiration. The simplest way to avoid assignment: close both legs before expiration day. This costs a small debit but eliminates assignment risk entirely.

    4. Have sufficient margin. Assignment on a short call creates a short stock position, which requires margin. Assignment on a short put requires cash to buy shares. Ensure your account can handle either scenario.

    5. Know your broker's process. Some brokers liquidate assigned positions automatically if you lack margin. Others give you until the next trading day to manage the position. Know the rules before you're in the situation.

    What to Do If Assigned

    Don't panic. Assignment changes your position but doesn't necessarily mean a loss.

    If call assigned (you're now short stock + short put):

  • If you're bearish: keep the position — it's a covered put
  • If you're neutral/bullish: buy back the short stock and close the put
  • Calculate your net P/L including the original premium collected

    • If put assigned (you're now long stock + short call):

  • If you're bullish: keep the position — it's a covered call
  • If you're bearish: sell the stock and close the call
  • Again, factor in the original premium

    • Assignment Probability by DTE and Moneyness

    | Moneyness | 30 DTE | 7 DTE | 1 DTE | ATMVery lowLowModerate 2% ITMLowModerateHigh 5% ITMModerateHighVery high | 10% ITM | High | Very high | Near certain |

    The deeper ITM and closer to expiration, the higher the assignment probability. If you don't want assignment, close ITM positions with 5+ days remaining.

    OptionsPilot tracks your short options' moneyness and time to expiration, alerting you when assignment probability increases so you can act before it happens.