How to Screen Covered Calls by IV Rank to Find the Best Premium Opportunities

The Short Answer: IV Rank Above 50 Is Your Starting Filter

To screen covered calls by IV rank, sort your watchlist for stocks where IV rank (IVR) is 50 or higher, then look for 30-to-45-day expirations and sell the call strike with a delta between 0.25 and 0.40. That combination puts you in positions where option buyers are paying elevated premiums relative to that stock's own history — which means more income for you as the seller.

IV rank is not the same as raw implied volatility. A stock can have a high IV number in absolute terms but still be cheap relative to its own past. IVR fixes that by measuring where today's IV sits on a 0-to-100 scale compared to the stock's 52-week IV range. An IVR of 70 means today's implied volatility is higher than 70% of all readings over the past year. That context is what makes it useful for covered-call screening.

What IV Rank Actually Measures — and Why It Matters for Sellers

The Options Industry Council (OIC) defines implied volatility as the market's forward-looking estimate of how much a stock will move, expressed as an annualized percentage. When IV is high, option premiums are fat. When IV is low, premiums are thin. As a covered-call seller, you want to sell when premiums are fat and let time decay (theta) work in your favor.

The problem with raw IV is that every stock has a different baseline. NVDA's IV regularly runs above 50% because it is a volatile semiconductor stock. A utility stock might rarely crack 25%. Comparing their raw IV numbers tells you nothing useful. IVR solves this by normalizing each stock against itself. An NVDA IVR of 60 and a utility IVR of 60 both mean the same thing: premiums are elevated relative to that stock's own recent history.

CBOE publishes the VIX, which is essentially an IVR-style measure for the S&P 500 as a whole. The same logic applies at the individual stock level. When a stock's IVR spikes — often around earnings, product launches, or macro events — call sellers can collect meaningfully more premium for the same strike and expiration than they could a month earlier.

Building Your Screener: The Five Filters to Set

Most retail brokerage platforms (thinkorswim, Tastytrade, Interactive Brokers, and others) include a built-in options screener. Here are the five filters to configure, in order of importance.

**Filter 1 — IV Rank ≥ 50.** This is your primary gate. Below 50, premiums are historically average or thin. Above 50, you are getting paid above-average for the risk you are already taking by owning the stock.

**Filter 2 — Stock already in your portfolio or on a pre-approved buy list.** Covered calls require owning 100 shares per contract. FINRA Rule 2360 and SEC regulations classify a call as "covered" only when you hold the underlying shares. Never sell a call on a stock you would not want to own through expiration.

**Filter 3 — Days to expiration (DTE) between 21 and 45.** Theta decay accelerates in the final 30 days of an option's life. Selling in the 21-to-45-day window lets you capture that acceleration while giving you time to manage the position if the stock moves against you.

**Filter 4 — Strike delta between 0.25 and 0.40.** Delta approximates the probability that the option expires in the money. A delta of 0.30 means roughly a 30% chance your shares get called away. That range balances premium income against the risk of assignment. The OIC's free educational materials explain delta in detail if you want a deeper reference.

**Filter 5 — Open interest ≥ 500 contracts at your target strike.** Thin markets mean wide bid-ask spreads. You want to sell at or near the mid-price, and that requires liquidity. Open interest of 500+ is a reasonable minimum for individual stocks; for ETFs like SPY, you can set this much higher.

Worked Example: NVDA and AAPL Side by Side

Let's walk through a real-world comparison using approximate market conditions from mid-2024.

**NVDA example.** Suppose NVDA is trading at $875 per share. Its 52-week IV range runs from roughly 40% (low) to 90% (high). Current IV is sitting at 72%, giving an IVR of approximately 67 — well above the 50 threshold. You look at the 35-day expiration and find the $920 strike call (delta ~0.30) bid at $18.50 and offered at $19.20. You sell one contract at the mid-price of $18.85, collecting $1,885 in premium on 100 shares. That represents a 2.2% return on the $875 cost basis in 35 days, or roughly 22% annualized if you could repeat it every month — which you cannot always do, but the math illustrates the opportunity.

**AAPL comparison.** At the same time, AAPL is trading at $189. Its 52-week IV range runs from 18% to 38%. Current IV is 22%, giving an IVR of only 19. The 35-day $195 call (delta ~0.30) is bid at $1.40 and offered at $1.55. You would collect roughly $147 per contract — a 0.78% return on the $189 cost basis. Same delta, same DTE, but less than half the premium income, because AAPL's IVR is low.

The screener's job is to surface the NVDA situation and filter out the AAPL situation automatically. You are not making a judgment about which stock is better. You are simply identifying when the options market is paying you more than usual to take on the same capped-upside risk you accept every time you sell a covered call.

Risks You Need to Understand Before You Screen Anything

High IVR is not free money. Here is what can go wrong, and why these risks belong at the top of your thinking, not the bottom.

**Why IV is elevated matters.** IVR spikes for a reason. Earnings announcements, FDA decisions on drug stocks, product recalls, macro data releases — these events create uncertainty, and the options market prices that in. If you sell a covered call the week before an earnings report and the stock drops 20% on bad results, your $1,885 in premium does not come close to covering the loss in share value. Many experienced covered-call traders avoid selling calls in the two weeks before a known earnings date for exactly this reason.

**Assignment risk.** If the stock rallies past your strike before expiration, your shares may be called away. You keep the premium, but you miss any gains above the strike. On a stock like NVDA that can move 10-15% in a week, that is a real cost. The OIC notes that early assignment on American-style options — which most US stock options are — can happen any time the option is in the money.

**Tax treatment.** The IRS treats premiums from covered calls as short-term capital gains in most cases, regardless of how long you have held the underlying shares. Selling a covered call can also affect the holding period of your shares under IRS qualified covered call rules (see IRS Publication 550). Canadian investors should consult CRA guidance, as the Canada Revenue Agency may treat option premiums as income rather than capital gains depending on the frequency and intent of trading. Neither the IRS nor CRA rules are simple here — talk to a tax professional before you scale up.

**Liquidity risk.** High IVR stocks often have wide bid-ask spreads on individual strikes. Always check the spread before placing an order. A $0.70 wide spread on a $5.00 premium is a 14% immediate haircut. Use limit orders at or near the mid-price, not market orders.

How to Turn Your Screener Results Into a Weekly Routine

A screener is only useful if you run it consistently. Here is a simple weekly process that takes about 20 minutes.

**Sunday evening or Monday morning:** Run your screener with the five filters above. Export or note the top 5-10 results from your existing holdings or buy list. Focus only on stocks you already own or would buy at current prices — the covered call does not change the fundamental ownership decision.

**Check the earnings calendar.** Cross-reference your screener results against the earnings calendar for the next 45 days. Remove any stock with an earnings date inside your target expiration window unless you have a specific strategy for that event.

**Rank by premium-to-strike ratio.** Divide the mid-price premium by the strike price. This gives you a clean apples-to-apples comparison across different-priced stocks. A $19 premium on a $920 strike is 2.1%. A $5 premium on a $195 strike is 2.6%. The second position is actually paying more per dollar of stock value.

**Place limit orders during market hours.** Implied volatility shifts throughout the day. Premiums are often richest in the first and last hour of trading when volume is highest. Avoid placing orders in the first 15 minutes after the open when spreads are widest.

**Track your results.** Keep a simple spreadsheet: ticker, IVR at entry, strike, premium collected, expiration date, outcome (expired worthless, rolled, assigned). After 10-15 trades, you will have your own data on which IVR thresholds and DTE windows work best for your specific holdings.

Free and Low-Cost Tools That Show IV Rank

You do not need expensive software to screen by IVR. Several platforms display it natively.

Thinkorswim (TD Ameritrade/Schwab) shows IVR and IV percentile in the options chain and in the built-in stock screener under the "Options Statistics" column. Tastytrade displays IVR prominently on every options chain — it is central to their trading philosophy. Interactive Brokers shows implied volatility percentile in TWS. Many Canadian brokers including Questrade and IBKR Canada offer similar tools.

For a free web-based option, the CBOE's website publishes volatility data for major indices and some individual names. Barchart.com and Market Chameleon both offer IVR data with free tiers that cover most liquid names.

One important note: different platforms calculate IVR slightly differently — some use 52-week ranges, others use shorter windows, and some use IV percentile (the percentage of days IV was lower) rather than true IVR. The concept is the same, but the numbers will not match exactly across platforms. Pick one platform and use it consistently so your comparisons are apples to apples.

What is a good IV rank for selling covered calls?

Most covered-call traders use an IVR of 50 or higher as a minimum threshold, meaning current implied volatility is above the midpoint of the stock's 52-week range. IVR between 50 and 80 is a practical sweet spot — premiums are elevated but the spike is not so extreme that it signals an imminent catastrophic event. Above 80, premiums are very rich but the reason for the spike deserves careful investigation before you sell.

Is IV rank the same as IV percentile?

No, they are related but calculated differently. IV rank compares today's IV to the 52-week high and low using a simple formula: (current IV minus 52-week low) divided by (52-week high minus 52-week low), multiplied by 100. IV percentile counts the percentage of days over the past year when IV was lower than today. Both measure relative expensiveness, but they can give different readings for the same stock on the same day, so check which one your platform uses.

Can I use this screener approach on ETFs like SPY or QQQ?

Yes, but ETFs like SPY and QQQ tend to have lower IVR than individual stocks because diversification smooths out single-stock volatility events. SPY's IVR rarely stays above 50 for extended periods outside of major market stress events. The screener approach still works — you just may find fewer ETF opportunities than individual stock opportunities in a calm market environment.

Should I sell covered calls right before earnings to capture the high IV?

Most experienced covered-call traders avoid this strategy because the risk is asymmetric. Yes, premiums are elevated before earnings, but a large post-earnings drop can easily exceed the premium collected. If you sell a call before earnings and the stock drops 15%, you still own the shares at a 15% loss minus the small premium cushion. Many traders instead sell calls immediately after earnings, when IV often collapses but the stock direction is clearer.

How does selling covered calls affect my taxes in the US and Canada?

In the US, the IRS generally treats covered-call premiums as short-term capital gains, and selling certain in-the-money calls can suspend the holding period of your underlying shares under the qualified covered call rules detailed in IRS Publication 550. In Canada, the CRA may treat option premiums as fully taxable income rather than capital gains if trading is frequent or conducted in a business-like manner. Both tax situations are complex enough that you should consult a qualified tax professional before scaling up your covered-call activity.

What happens if my covered call gets assigned early?

Early assignment means the option buyer exercises their right to buy your shares before expiration, which can happen any time the call is in the money on an American-style option. When assigned, your 100 shares are sold at the strike price and you keep the premium already collected — the position simply closes early. The OIC notes that early assignment is most common just before an ex-dividend date, when the option buyer may want to capture the dividend by owning the shares.