Covered Call Screener by Premium Percentage: How to Find the Best Yield Trades Fast

What Premium Percentage Actually Means in a Covered Call Screener

A covered call screener sorted by premium percentage ranks every eligible option by how much cash you collect divided by the current stock price. If you own 100 shares of Apple (AAPL) trading at $195 and you sell the $200 strike call expiring in 30 days for $2.10, your premium percentage is $2.10 ÷ $195 = 1.08% for that month. That single number lets you compare a tech stock against an energy stock against an ETF on the same scale, without doing the math yourself.

This is the core feature retail traders should look for in any screener. Raw dollar premiums are meaningless on their own — a $5 premium on a $500 stock is actually worse than a $1.50 premium on a $50 stock. Premium percentage fixes that distortion instantly.

How to Read a Premium Percentage Screener: The Key Columns

A well-built screener sorted by premium percentage will show you at least these columns side by side:

1. **Ticker and last price** — the stock you already own or plan to buy. 2. **Strike price** — the price at which you agree to sell your shares. 3. **Expiration date** — when the contract expires. 4. **Bid price** — what the market will actually pay you (always use the bid, not the midpoint, for conservative planning). 5. **Premium %** — bid ÷ stock price, expressed as a percentage. 6. **Annualized yield** — premium % scaled to a full year (monthly premium % × 12, or daily premium % × 365). This lets you compare a 7-day trade to a 45-day trade fairly. 7. **Delta** — a rough probability proxy. A delta of 0.20 means the option has roughly a 20% chance of finishing in the money, per the Options Industry Council (OIC). 8. **Implied Volatility (IV)** — higher IV inflates premiums. Knowing IV helps you judge whether a fat premium is a real opportunity or a warning sign.

When you sort descending by premium %, the highest-yielding trades float to the top. Your job is then to filter out the ones that are high-yield for the wrong reasons.

Worked Example: Screening AAPL, MSFT, and NVDA Side by Side

Let's say you run a screener on a Monday morning with these three positions in your portfolio. All expirations are 30 days out.

**Apple (AAPL) — stock at $195** - Strike: $200 (about 2.6% OTM) - Bid: $2.10 - Premium %: 1.08% - Annualized yield: ~12.9% - Delta: 0.28

**Microsoft (MSFT) — stock at $415** - Strike: $425 (about 2.4% OTM) - Bid: $4.80 - Premium %: 1.16% - Annualized yield: ~13.9% - Delta: 0.27

**NVIDIA (NVDA) — stock at $875** - Strike: $920 (about 5.1% OTM) - Bid: $18.50 - Premium %: 2.11% - Annualized yield: ~25.3% - Delta: 0.25

Sorted by premium %, NVDA lands at the top. But notice that NVDA's implied volatility is much higher than AAPL's or MSFT's. That elevated IV is why the premium is rich — the market is pricing in a bigger potential move. If NVDA gaps up 10% on an earnings surprise, your shares get called away at $920 and you miss the upside above that level. The screener surfaces the opportunity; you still have to decide whether the trade fits your risk tolerance and your view on the stock.

Why High Premium Percentage Is Not Always a Good Signal

This is the risk section, and it belongs near the middle of the article — not buried at the end.

A screener will happily show you a small-cap stock with a 4% monthly premium. What it may not show you prominently is that the stock has an earnings announcement in 10 days, the bid-ask spread on the option is $1.20 wide, and average daily option volume is 12 contracts. Those three facts can turn a 4% yield into a losing trade.

**Earnings risk.** When a company reports earnings while you hold a short call, the stock can move far more than the premium you collected. FINRA and the SEC both require brokers to disclose that options involve substantial risk, including the risk of losing the entire value of the underlying position in extreme scenarios. A covered call caps your upside but does not protect your downside.

**Liquidity risk.** Wide bid-ask spreads mean you give up yield the moment you enter the trade. If the bid is $2.00 and the ask is $3.20, the midpoint is $2.60 — but you will likely fill closer to $2.00 to $2.20. Always use the bid price in your premium % calculation, not the midpoint.

**Assignment risk.** If the stock closes above your strike at expiration, your shares are called away. For Canadian investors, the Canada Revenue Agency (CRA) treats the assigned sale as a capital disposition in the tax year it settles. For US investors, the IRS has specific rules on how the call premium interacts with the holding period of your shares — selling a deep in-the-money call can suspend the long-term holding period clock. Consult a tax professional before trading.

**Volatility crush.** After a high-IV event like earnings passes, IV collapses. If you sold a call before earnings and the stock barely moved, you might be able to buy it back cheaply — but if you were hoping to ride that premium to expiration, the trade may behave differently than expected.

How to Set Filters That Make the Screener Actually Useful

Sorting by premium % alone gives you a raw list. Filters turn it into an actionable shortlist. Here are the filter settings most experienced covered-call sellers use as a starting point:

- **Minimum open interest: 500 contracts.** This ensures there is a real market for the option and you can exit without moving the price against yourself. - **Maximum delta: 0.35.** Keeps you selling out-of-the-money calls where the probability of assignment is lower. The OIC defines delta as the rate of change in option price relative to a $1 move in the stock — as a rough rule, delta ≈ probability of expiring in the money. - **Days to expiration (DTE): 21–45 days.** This range captures the steepest part of the theta decay curve. Theta is the daily time-value erosion that works in your favor as a seller. - **Exclude earnings within DTE window.** Most screeners let you toggle this. Use it. - **Minimum annualized yield: 10–12%.** Below this, the trade may not compensate you for the complexity and commission costs. - **Underlying price above $20.** Very low-priced stocks often have wide spreads and erratic behavior.

Once you apply these filters and sort by premium %, you typically get a list of 10–30 trades worth a closer look. From there, you cross-check each one against your own portfolio — do you actually own the stock, and are you comfortable selling at that strike?

Annualized Yield vs. Monthly Yield: Which Number Should You Trust?

Screeners often display both numbers, and they can look very different. A 2% monthly premium annualizes to roughly 24% — which sounds extraordinary. But annualized yield assumes you can replicate the same trade every single month for 12 months at the same premium level. In practice, IV changes, stock prices move, and some months you will not find a trade that meets your criteria.

Use annualized yield for comparing trades of different durations — it is the only fair way to put a 14-day trade next to a 45-day trade. Use monthly (or per-period) yield for setting realistic income expectations. If you own $100,000 in stock and your screener shows an average monthly premium % of 1.2%, you can reasonably expect roughly $1,200 in gross premium income that month, before commissions and taxes.

Neither number accounts for the possibility that your stock drops 15% while you are holding the position. The premium you collected partially offsets that loss, but it does not eliminate it. Covered calls reduce cost basis and generate income — they do not transform a stock position into a risk-free investment.

Building a Simple Weekly Screening Routine

The traders who get consistent results from covered calls treat screening as a repeatable process, not a one-time event. Here is a simple weekly routine that takes about 20 minutes:

**Monday morning, before the open:** 1. Open your screener. Set filters: OI ≥ 500, delta ≤ 0.35, DTE 21–45, no earnings in window, annualized yield ≥ 10%. 2. Sort by premium % descending. 3. Cross-reference the top 15 results against your current holdings. 4. For each match, check the IV rank or IV percentile (many screeners show this). If IV rank is above 50, the premium is historically elevated — potentially a better time to sell. If IV rank is below 30, the premium may be thin. 5. Check the chart for obvious support and resistance levels near your intended strike. 6. Place limit orders at or near the bid. Do not chase the midpoint on illiquid options.

This routine keeps you disciplined and prevents the common mistake of selling calls reactively — right after a big up day when you feel confident but IV may already be dropping.

For Canadian investors: the CRA generally treats covered call premiums as capital gains or income depending on your trading frequency and intent. The OIC and CRA both publish guidance on options taxation. Keep records of every trade, including the premium received, the strike, and the expiration date.

What is a good premium percentage for a covered call?

Most retail covered-call sellers target a monthly premium percentage between 1% and 3% of the stock price, which annualizes to roughly 12–36%. Below 1% per month, the income may not justify the complexity and commission costs. Above 3–4% per month, the market is usually pricing in a significant risk event like earnings, so investigate before selling.

How do I calculate covered call premium percentage myself?

Divide the option bid price by the current stock price and multiply by 100. For example, if you sell a call for $2.50 on a stock trading at $200, the premium percentage is ($2.50 ÷ $200) × 100 = 1.25%. Always use the bid price, not the midpoint or ask, for a conservative estimate of what you will actually receive.

Which free screeners let you sort covered calls by premium percentage?

Several platforms offer this feature at no cost, including the CBOE's tools section, Barchart.com, and the options screener built into Thinkorswim (TD Ameritrade/Schwab). Each lets you filter by expiration, delta, and open interest and then sort results by premium yield. Always verify the data with your broker's live quote before placing a trade.

Does a high premium percentage mean the stock is risky?

Usually yes — high premiums are driven by high implied volatility, which reflects market uncertainty about the stock's near-term direction. That uncertainty could be an upcoming earnings report, a product launch, or macro sensitivity. The Options Industry Council (OIC) notes that implied volatility is one of the primary drivers of option pricing, so a fat premium is often a signal to do more research, not less.

How does selling a covered call affect my taxes in the US?

The IRS treats covered call premiums as short-term capital gains in most cases, reported in the year the position closes. Selling a deep in-the-money call can also suspend the long-term holding period on your underlying shares, which could convert a long-term gain into a short-term gain if the shares are called away. Consult a qualified tax advisor and review IRS Publication 550 for the specific rules that apply to your situation.

What delta should I target when screening covered calls by premium?

Most covered-call sellers target a delta between 0.20 and 0.35 for a balance of premium income and a reasonable buffer before assignment. A delta of 0.30 means the option has roughly a 30% chance of expiring in the money, per the OIC's options education materials. Lower delta means less premium but more room for the stock to run before your shares get called away.