Selling covered calls between 0.20 and 0.30 delta hits the sweet spot for most wheel traders. That range gives you enough premium to make the trade worthwhile while keeping a reasonable buffer before your shares get called away.
Here's the thing though — delta isn't a magic number you set and forget. It's a starting point that shifts based on what you actually want to happen with the position.
What delta is really telling you
When you sell a 0.25 delta call, the market is roughly pricing in a 25% chance that call expires in-the-money and your shares get called away. Flip that around: there's a 75% chance you keep your shares and pocket the premium. That's the trade-off you're constantly managing in the wheel.
A higher delta like 0.40 means more premium in your pocket right now, but you're giving up more upside and accepting a higher probability of assignment. A lower delta like 0.10 gives you almost no premium — you're basically working for free.
Walking through a real example with AAPL
Let's say you own 100 shares of Apple at $185 and you're running the wheel. With AAPL trading at $185, you might look at the $190 strike expiring in about 30 days. If that strike sits around 0.25 delta, you could collect somewhere in the $2.50-$3.00 range per share — so $250-$300 in premium for one contract.
Now compare that to the $195 strike at 0.15 delta. Maybe you're only collecting $1.20. Is that worth tying up your shares for a month? Probably not, unless you're really attached to holding AAPL long-term and you're just collecting a little extra income on the side.
On the other side, the $187.50 strike might be sitting at 0.40 delta and paying $4.00. That sounds great until you realize Apple only needs to move 1.3% to start eating into your gains, and if earnings are coming up, you're taking on real risk of assignment at a price where you might not want to sell.
When to go lower delta
If you bought shares after assignment from a cash-secured put and your cost basis is sitting right around current market price, going lower delta — like 0.15 to 0.20 — makes sense. You don't want to cap your gains immediately after getting assigned. Give the stock some room to run. You're still collecting something, and you're not stuck selling at a loss if the stock pops.
This is also where I'd land if the stock just had a big move up and implied volatility has spiked. You can collect decent premium at a lower delta because IV is elevated — so the dollar amount of premium at 0.20 delta might actually look similar to what you'd normally get at 0.30 delta in a calm market.
When to push higher delta
If you're actively trying to exit a position — maybe you're done with NVDA after a big run and you wouldn't mind getting called away — then selling a 0.40 delta call isn't reckless, it's intentional. You're using the covered call to set a price you're happy selling at and getting paid to wait for it.
Same logic applies when premium is thin across the board. Sometimes IV is so low that selling a 0.20 delta call barely covers your commissions. In those cases, you either go higher delta to get paid adequately, or you skip the trade entirely and wait for better conditions. Don't sell a covered call just to say you did something.
The 30-45 DTE question
Delta and time to expiration are linked. A 0.25 delta call at 45 days to expiration behaves differently than a 0.25 delta call at 7 days out. Most wheel traders find the 30-45 DTE window works well because theta decay accelerates in that range, and you're not so close to expiration that a single bad day wrecks the trade.
If you go shorter — like weekly options — you need to trade more frequently and your delta choices matter more because there's less time for the position to recover if the stock moves against you.
What I'd actually do
For most wheel positions on liquid stocks like AAPL, MSFT, or AMD, I'd start at 0.25 delta with 30-35 DTE and adjust from there based on where my cost basis sits. If the stock has moved significantly above my basis, I'll go lower and give it room. If I'm basically at breakeven and want to grind out income, I'll stay in that 0.25-0.30 range.
The practical takeaway: pull up your next covered call trade and check both the 0.20 and 0.30 delta strikes. Look at the actual dollar premium, calculate your annualized return if you collected that premium every month, and then ask yourself whether you'd be genuinely okay getting called away at that strike. If the answer is yes, sell it. If it makes you uncomfortable, go one strike higher and accept less premium for more breathing room.