Market Cap Filter: Stick to Stocks That Won't Disappear
Use the Market Cap filter to bias the wheel toward large, established companies — fewer surprises, deeper liquidity, better fills.
Why market cap matters for options
Market cap (shares outstanding × price) is a fast proxy for company stability and options-market depth.
| Bucket | Range | Wheel suitability |
|---|---|---|
| Mega Cap | $200B+ | Excellent — deepest liquidity |
| Large Cap | $10B – $200B | Excellent — wheel default |
| Mid Cap | $2B – $10B | Good — but check liquidity |
| Small Cap | $300M – $2B | Marginal — often illiquid options |
| Micro Cap | < $300M | Avoid — no real options market |
Where to find it
The Market Cap filter is in the sidebar of both screeners with an exponential slider in $ billions (0 to 1,000+).
Recommended ranges
| Style | Market Cap | Notes |
|---|---|---|
| Blue-chip only | 100 – 1000+ | Most defensive |
| Standard wheel | 10 – 1000 | Default for new wheelers |
| Mid-cap hunting | 2 – 10 | Higher premium, more risk |
| Anything goes | 0 – 1000 | Default — no filter |
A simple recipe
You want only large-cap puts:
- Open the Put screener.
- Set Market Cap to 25 – 1000 (B).
- Apply Earnings Safe preset.
- Sort by Rating descending.
The result is an institutional-quality CSP shortlist.
Common mistakes
1. Going too narrow. $100B+ excludes great wheel names like AMD, NFLX, and many semis. $10B+ is a saner default.
2. Confusing market cap with float. Market cap is total value. Float is what's actually tradable. The screener uses market cap because it's universally defined, but for ultra-low-float names, options can still be wild.
Where to go next
- Try Large Cap preset for one-click setup.
- Pair with P/E Ratio filter for value tilt.
- Add Sector filter for diversification.
Frequently Asked Questions
What's the safest market cap for the wheel strategy?
Large caps ($10B+) are the safest sweet spot — deep options liquidity, stable businesses, and analyst coverage. Mega caps ($200B+) add even more stability at the cost of slightly lower premiums.