Strike Price Selection for Income

Two investors sell covered calls on the same stock. One earns 2% monthly but keeps getting assigned. The other earns 0.8% monthly but never loses shares. Who made the better choice? It depends entirely on their goals, and strike price selection is how you control that outcome.

TL;DR

• Strike price is your primary lever: It determines income level, assignment probability, and upside potential
• Higher strikes = less income but more upside: You keep shares longer but collect smaller premiums
• Lower strikes = more income but capped gains: Better premiums but higher chance of assignment
• Match strikes to your valuation: Set strikes near or above fair value to avoid selling winners too cheap
• No single right answer: Your ideal strike depends on market conditions, position goals, and risk tolerance

The Strike Price Trade-Off

Every covered call and cash-secured put involves a fundamental trade-off:

For covered calls:

• Sell at a higher strike = lower premium, lower assignment probability, more upside potential
• Sell at a lower strike = higher premium, higher assignment probability, capped upside

For cash-secured puts:

• Sell at a higher strike = higher premium, higher assignment probability, smaller discount
• Sell at a lower strike = lower premium, lower assignment probability, bigger discount if assigned

There's no universally "correct" strike. The right choice depends on what you're optimizing for: maximum income, share retention, or balance.

Strike Selection for Covered Calls

When selling covered calls, your strike price determines how much upside you're willing to surrender for premium income.

Conservative (Far OTM): 8-12% above current price

• Premium yield: 0.5-1% monthly
• Assignment probability: 10-20%
• Best for: Stocks you never want to sell, positions at or below fair value

Example: Stock at $100, sell $110 call, collect $0.80. You earn modest income while retaining almost all upside to $110. Assignment only happens in strong rallies.

Moderate (Mid OTM): 4-7% above current price

• Premium yield: 1-2% monthly
• Assignment probability: 20-35%
• Best for: Core positions where you're comfortable selling above fair value

Example: Stock at $100, sell $105 call, collect $1.50. Balanced approach with meaningful income and reasonable upside retention.

Aggressive (Near ATM): 1-3% above current price

• Premium yield: 2-4% monthly
• Assignment probability: 35-50%
• Best for: Positions at or above fair value you'd be happy to exit

Example: Stock at $100, sell $102 call, collect $2.50. Maximum income but frequent assignment. Works if the stock is fully valued.

The Fair Value Anchor

Value investors have an advantage in strike selection: you've already calculated intrinsic value.

The principle: Never sell calls with strikes below your fair value estimate.

If you believe a stock is worth $120 and it trades at $100, selling $105 calls gives away $15 of upside for maybe $2 in premium. That's a bad trade. Instead, sell $115-120 calls, capturing almost all the value realization while still earning income.

Framework based on current price vs. fair value:

Use Wall St Yardie to calculate fair value and anchor your strike selection to real valuation work, not arbitrary percentages.

Strike Selection for Cash-Secured Puts

Put strike selection determines your effective buy price and income yield.

Conservative (Far OTM): 10-15% below current price

• Premium yield: 0.3-0.8% monthly
• Assignment probability: 10-20%
• Best for: Stocks at fair value where you want a significant discount

Example: Stock at $100, sell $85 put, collect $0.50. You only buy if there's a meaningful correction. Lower income but excellent entry price if assigned.

Moderate (Mid OTM): 5-10% below current price

• Premium yield: 0.8-1.5% monthly
• Assignment probability: 20-35%
• Best for: Stocks slightly above your target price

Example: Stock at $100, sell $92 put, collect $1.20. Balanced income and discount. Assignment gives you a reasonable entry point.

Aggressive (Near ATM): 1-5% below current price

• Premium yield: 1.5-3% monthly
• Assignment probability: 35-50%
• Best for: Stocks you actively want to own now

Example: Stock at $100, sell $98 put, collect $2.00. High income and you get shares at only a small discount. Use when you'd buy at current prices anyway.

The Target Price Anchor

Just as fair value anchors covered call strikes, your target buy price anchors put strikes.

The principle: Set put strikes at or below prices you've determined are attractive entries.

If you'd buy a stock at $85 with a 20% margin of safety below $106 fair value, sell puts at $85 or below. Don't sell $95 puts just because the premium is better, you'd be committing to buy above your target price.

Framework based on current price vs. target:

Your put strike should represent a price you'd be genuinely happy to pay, not just a number that generates good premium.

Adjusting for Market Conditions

Strike selection isn't static. Market conditions should influence your choices:

High volatility environments (VIX above 25):

• Premiums are elevated, so you can sell further out of the money and still earn good income
• Move strikes 1-2 increments further OTM than normal
• Focus on income rather than trying to time perfect entries

Low volatility environments (VIX below 15):

• Premiums are compressed, so you need closer strikes for meaningful income
• Consider selling slightly closer to current prices
• Accept lower yields rather than chasing inappropriate strikes

After significant stock drops:

• Premiums spike due to fear
• Excellent time to sell puts at your target prices
• Don't chase elevated premiums by selling at prices you don't actually want

After significant rallies:

• Premiums compress as fear subsides
• Good time to sell covered calls above fair value
• Be careful not to sell calls too close if you believe the rally continues

Common Strike Selection Mistakes

Mistake 1: Chasing premium at bad strikes

Selling $95 puts instead of $85 puts because the premium is 2% versus 0.8%. The extra 1.2% doesn't compensate for buying $10 higher.

Fix: Calculate your target price first, then check what premium that strike offers. Don't work backwards from desired premium to strike.

Mistake 2: Never adjusting for conditions

Using the same 5% OTM calls regardless of volatility or stock movement. Static rules ignore valuable market information.

Fix: Develop a range of acceptable strikes (e.g., 3-8% OTM) and choose within that range based on current conditions.

Mistake 3: Ignoring fair value changes

Setting strikes based on your original fair value estimate without updating as fundamentals change.

Fix: Revisit fair value quarterly. If the business improved and fair value increased, adjust strike selection upward.

Mistake 4: Fear of assignment driving strikes too high

Selling $120 calls on a $100 stock to "make sure" you're never assigned. You collect almost nothing and might as well not bother.

Fix: Accept that assignment is part of income strategies. If you're truly unwilling to sell at any reasonable strike, covered calls aren't appropriate for that position.

Mistake 5: Optimizing for yield percentage, not dollars

Obsessing over "2% monthly yield" when absolute dollars matter more. A 2% yield on a $20 stock is $0.40. A 1% yield on a $200 stock is $2.00.

Fix: Think in absolute dollar income across your portfolio, not just yield percentages on individual positions.

A Practical Example

Let's walk through strike selection for a real scenario:

Position: 300 shares of Microsoft at $380 Your fair value estimate: $420 Current market: Moderate volatility (VIX ~18) Goal: Generate income while retaining upside to fair value

Step 1: Identify strike range Fair value is $420, current price is $380. You want to capture the $40 upside potential. Strike range: $400-420 (5-10% OTM, at or below fair value)

Step 2: Check available strikes and premiums

• $400 call (5% OTM): $5.50 premium, 1.4% monthly yield
• $410 call (8% OTM): $3.80 premium, 1.0% monthly yield
• $420 call (10.5% OTM): $2.40 premium, 0.6% monthly yield

Step 3: Select based on objectives If you want maximum income with acceptable upside: $400 strike If you want to capture most upside with decent income: $410 strike If you want to capture all upside to fair value: $420 strike

Step 4: Execute You choose the $410 strike, collecting $1,140 monthly (3 contracts × $3.80 × 100) while retaining $30/share upside potential. If MSFT rises to $410+, you sell at an acceptable price (2.4% below fair value) with the premium collected.

What Could Go Wrong?

Stock gaps through your strike: Overnight news sends your $100 stock to $130. Your $110 call meant you sold at $110, missing $20 of the move.

Mitigation: Accept this as the cost of income strategies. You still earned premium plus $10 appreciation. Over time, the income from calls that expire worthless offsets the occasional missed rally.

You anchor to stale fair value: Your $120 fair value estimate was wrong, the stock is actually worth $150, and your $115 calls keep getting assigned.

Mitigation: Revisit fair value regularly. If a stock consistently breaks through your strikes, either your estimate is wrong or the market knows something you don't. Update your analysis.

Premium income creates overconfidence: You keep lowering strikes to chase yield, eventually selling calls below fair value and giving away value for pennies.

Mitigation: Hard rule: never sell calls with strikes below your current fair value estimate. Premium income is bonus income, not a reason to sell winners cheap.

Next Steps

• Calculate fair value for each income position: This anchors all strike decisions
• Define your strike range: For covered calls, how far above current price? For puts, how far below?
• Check current volatility: Is VIX elevated (favor further OTM) or depressed (accept closer strikes)?
• Review strike premiums: Ensure the income justifies the trade-off at your chosen strike
• Document your reasoning: Record why you chose each strike so you can review and improve
• Track outcomes: Note how often you're assigned and whether strikes were too aggressive or conservative
• Adjust quarterly: As fair value estimates change, update your strike selection approach

Strike selection is where art meets science in income investing. The numbers give you probabilities and yields. Your judgment determines what trade-offs make sense for your goals.

Get comfortable with the range of outcomes. Sometimes you'll miss rallies. Sometimes you'll buy at higher prices than you'd prefer. Over many trades, proper strike selection based on fair value creates consistent income without systematically giving away your winners.

That's the income investor's discipline: earn premium steadily while respecting the value of what you own.