Avoid, Indifferent, Open — What Your Assignment Preference Actually Changes

When you set your assignment preference in the app, you're making one concrete choice: the delta of the covered call the engine targets for you. That single number controls everything else — how much premium you collect, how close your strike sits to the current stock price, and roughly how often your shares get called away.

The preference isn't a cosmetic label. Change it and the fundamental character of the trade changes with it. Understanding what moves at each level is the difference between choosing a preference that fits your situation and picking one because it sounds right.

Here's what each setting actually means in practice.

What Delta Has to Do With It

Delta measures how much an option's price moves when the stock moves $1. A delta of 0.25 means the option gains roughly $0.25 in value for every $1 the stock rises. For covered call sellers, delta also functions as a rough probability estimate: a 0.25-delta call has approximately a 25% chance of expiring in the money, meaning your shares would be assigned.

Flip that around: a 0.25-delta call has roughly a 75% chance of expiring worthless — which is exactly what you want. The premium is yours to keep, the shares stay in your account, and you sell another call next cycle.

The three assignment preferences target different points on that probability spectrum:

• Avoid (0.15 delta): roughly 15% assignment probability, 85% chance option expires worthless
• Indifferent (0.25 delta): roughly 25% assignment probability, 75% chance option expires worthless
• Open (0.35 delta): roughly 35% assignment probability, 65% chance option expires worthless

These aren't arbitrary categories. The 0.15–0.35 range is where the practical covered call sweet spot lives for most stocks: far enough out of the money to avoid constant assignment, close enough to generate meaningful premium.

The Premium Difference: What You're Actually Giving Up or Gaining

Here's a concrete example using MSFT trading around $420, with a 30-day expiration cycle.

At the Avoid preference (0.15 delta), the analysis targets a strike around $450. A call at that strike might pay roughly $1.80–$2.20 in premium — call it $2.00 per share, or $200 per contract. The stock would need to rally more than 7% before expiration for this call to go in the money.

At the Indifferent preference (0.25 delta), the target strike drops to around $440. Premium here might run $2.80–$3.40 — call it $3.10 per contract. The stock needs a 4.8% rally to threaten assignment.

At the Open preference (0.35 delta), the target strike might sit near $430. Premium climbs to $4.00–$4.80, call it $4.40. The stock needs a 2.4% move to reach that strike.

The premium difference between Avoid and Open in this example is roughly $2.40 per share — $240 per contract. Over 12 monthly cycles, that gap compounds to nearly $2,900 in additional annual premium per 100 shares of MSFT. That's real money.

But look at what's also changing: the stock needs to move 7% to threaten the Avoid strike, versus only 2.4% for Open. MSFT moves 2-4% in normal weeks fairly routinely. The Open preference is collecting more premium in exchange for living much closer to the edge.

What Assignment Risk Actually Looks Like Over Time

The probability numbers — 15%, 25%, 35% — are per-cycle estimates. Across a full year of monthly cycles, the assignment math compounds.

At Avoid (15% per cycle), running 12 cycles, the expected number of assignments in a year is roughly 1.5-2. Some years you'll have zero; some years you'll have three. The experience is largely quiet — you sell calls, they expire, you repeat.

At Indifferent (25% per cycle), expected annual assignments run closer to 2-3. Still manageable, and each assignment event is a profitable outcome (you sold at a strike above the market price at time of sale, plus kept the premium). But you'll see assignment events more regularly and need to make rebuy decisions more often.

At Open (35% per cycle), expected annual assignments climb to 4-5. That's roughly one assignment every two to three months. You'll spend more time assessing whether to rebuy, waiting for re-entry opportunities, and potentially sitting on the sidelines if the stock runs too far after assignment.

None of these are bad outcomes in isolation — assignment at your chosen strike is a defined result, not a loss. But the rhythm of the strategy changes substantially depending on which preference you've chosen.

(For a closer look at what assignment actually involves, see Assignment Sounds Like a Problem. Here's Why It Isn't.)

The Real Tradeoff: Income Certainty vs. Maximum Income

Here's the version of the tradeoff that doesn't show up in the numbers: assignment interrupts your income stream.

When your shares get called away, you're not immediately selling another call. You're waiting to see if the stock pulls back to a reasonable rebuy level. If it does, you rebuy and restart the cycle. If the stock keeps running — like NVDA did after its 2023 assignment — the position may not come back at all.

That interruption risk is real and meaningful. Avoid positions, by staying far from the money, are much less likely to create assignment events that break the income cycle. The lower per-cycle premium is the insurance premium you pay to keep the machine running smoothly.

Open positions generate more per-cycle income but create more frequent interruptions. Over a long period in a trending market, the assignments can add up in ways that erode the theoretical premium advantage.

Your account type sets the starting preference: tax-advantaged accounts (Roth, Traditional, HSA) start at Indifferent; taxable accounts usually start at Avoid so a called-away position doesn't force a taxable sale. Change it anytime — the right preference depends on what you're optimizing for.

How to Think About Which Setting Fits You

A few questions that shift the calculus:

How would you feel about assignment? If the idea of having your shares called away at a profit feels disruptive or uncomfortable, lean Avoid. The lower premium is worth the smoother experience. If assignment feels like a normal part of the cycle — a defined outcome you planned for — Indifferent or Open may fit.

What's the stock doing? In a trending market where a stock has been moving steadily upward, Open strikes are more likely to be tested. In a range-bound or slow-drift environment, the same Open preference might run for months without a close call. The assignment preference isn't calibrated once and forgotten — it's worth reviewing when the stock's behavior changes.

What's your account structure? In a Roth IRA or Traditional IRA, assignment events don't create immediate tax complications. In a taxable account, assignment triggers a taxable stock sale, and your holding period on the repurchased shares resets. Taxable account holders often start at Avoid specifically to reduce the frequency of these events — not because of assignment risk, but because of the tax accounting. This is general information, not tax advice — your situation may differ, so check with a tax professional.

How concentrated is the position? If you own a large, concentrated MSFT position you've built over years and genuinely don't want to sell, Avoid makes sense. The lower premium is a reasonable cost for protecting the position. If you own a diversified basket where individual assignments are manageable events, Indifferent or Open works fine.

Curious what the income math looks like across your specific holdings at each preference level? The free estimator runs these numbers on your actual portfolio.

Frequently Asked Questions

Can I run different preferences on different stocks in the same portfolio?

Conceptually, yes — different positions can warrant different risk tolerances. A long-held position you don't want to sell fits the Avoid logic; newer positions you're comfortable cycling fit Indifferent or Open. At launch the free tier uses one assignment preference at the portfolio level; choose the one that best matches your overall holdings.

Does the assignment preference change the strike automatically?

Yes. When you set an assignment preference, the analysis engine targets the appropriate delta and selects a strike accordingly. You don't have to calculate the strike yourself — the engine finds the option closest to the target delta in the available chain and flags it as the analysis.

If Open generates more premium, why wouldn't everyone use it?

Because of assignment frequency. More premium per cycle is only an advantage if the income stream stays intact. Open positions get assigned more often, which means more rebuy decisions, more waiting for re-entry, and more risk that the stock runs away after assignment and doesn't come back. The extra premium is real; so is the cost.

What happens to my assignment preference when the stock gets assigned?

The preference stays on record. When (or if) you rebuy the shares and restart the cycle, the engine uses the same preference to generate the next analysis. You can change the preference between cycles if your view on the stock or your risk tolerance has shifted.

Is there a "best" preference that the simulation data supports?

The right preference depends on what you're optimizing for: maximum income per cycle, minimum assignment interruptions, or the balance between them. Avoid generates steady, lower income with the fewest interruptions. Open generates higher per-cycle premium with more frequent assignment pauses. Indifferent sits between. See also: What Delta Actually Tells You When You Sell a Covered Call