The Math: Weekly vs Monthly Premium
Let's compare using AMD at $130 with 40% implied volatility:
Weekly (7 DTE) 20Δ put at $125:
Monthly (30 DTE) 20Δ put at $125:
On paper, weeklies win by a landslide — 58% vs 37% annualized. But this comparison ignores several critical factors.
Why Monthly Options Often Win in Practice
Time Decay Isn't Linear
Options don't lose value evenly. The first two weeks of a 30-day option decay slowly, while the last week decays rapidly. When you sell a weekly, you capture mostly the fast-decay portion, which sounds good — but you're also exposed to the highest gamma risk.
Gamma risk means that near expiration, small stock moves cause large changes in delta. A stock sitting right at your strike on a Friday can easily gap through it on Monday morning, resulting in assignment you didn't expect.
Transaction Costs Add Up
Each trade has friction costs: the bid-ask spread, any commissions, and the time you spend managing it.
Weekly approach: 52 trades per year per position, 52 bid-ask spreads to cross Monthly approach: 12 trades per year per position, 12 bid-ask spreads to cross
If the bid-ask spread on your option is $0.10, that's $10 per trade. Over a year: $520 for weeklies vs $120 for monthlies. On a $12,500 position, that's a 3.2% return difference just from friction.
Assignment Rate Comparison
| Expiration | Same 20Δ Strike | Actual Assignment Rate | Why |
Weeklies get assigned more often because there's less time for the stock to recover from a dip near expiration.
When Weeklies Make Sense
Large, liquid stocks with tight spreads. SPY weekly options have penny-wide spreads. AAPL, MSFT, and AMZN are similar. The friction cost argument fades with ultra-liquid names.
Active traders who enjoy managing positions. If you like checking your portfolio daily and making adjustments, weeklies give you more decisions to make and more opportunities to react to market conditions.
Volatile environments. When the VIX is high, weekly premiums are especially rich. Selling weekly puts during a fear spike captures the elevated premium before it decays.
When Monthlies Make Sense
Most people, most of the time. Seriously. The wheel is supposed to be a relatively passive income strategy. Trading monthly means you review positions 12 times per year instead of 52.
Stocks with wider bid-ask spreads. If you're wheeling a $20 stock where the option spread is $0.15-$0.20, trading monthly saves you $500+ per year in friction.
Traders who have day jobs. Monthly expirations happen on Fridays. You can make decisions over the weekend and place trades Monday morning. Weeklies demand attention every week.
The Hybrid Approach
Some traders use a 30-45 DTE entry but close positions early when they've captured 50-70% of the premium. This captures most of the theta decay while leaving before gamma risk spikes.
Example:
This approach gives you the premium efficiency of monthlies with a faster capital recycling rate. You typically end up making 8-10 trades per year per position instead of 4-6, with better risk-adjusted returns.
OptionsPilot shows both weekly and monthly option chains side by side, making it easy to compare premium per day across different expirations.