P/S Ratio Filter: Screening Stocks by Price-to-Sales
When to use the Price-to-Sales ratio, what ranges work for wheel strategy stocks, and why P/S is more useful than P/E for companies with thin or negative earnings.
What is the P/S ratio?
P/S = Market Capitalisation ÷ Annual Revenue
The Price-to-Sales (P/S) ratio tells you how much investors are paying for each dollar of revenue. Unlike P/E, it never becomes negative — a company that loses money still has revenue.
When to prefer P/S over P/E
- High-growth companies that are deliberately unprofitable (reinvesting in growth).
- Cyclical businesses where earnings swing wildly but revenue is steadier.
- Financial distress — a company with thin margins might have a very high P/E but a low P/S, hinting at turnaround potential.
Recommended ranges
| Sector | Reasonable P/S |
|---|---|
| Consumer staples | 0.5 – 2.0 |
| Industrials | 0.8 – 2.5 |
| Healthcare | 1.5 – 5.0 |
| Technology | 3.0 – 10.0 |
| SaaS / software | 5.0 – 15.0 |
A P/S above 15 on any company usually means the market expects very high future margins — high risk territory for wheel traders.
Using P/S in the screener
P/S is best as a maximum filter:
- Open the Stock Screener.
- Find P/S under Valuation filters.
- Set max to 4 for a broad, diversified screen.
- Pair with a Gross Margin minimum to ensure the revenue is at least somewhat profitable.
Common mistakes
1. Ignoring margin. A P/S of 1 on a grocery store (2% net margin) is totally different from a P/S of 1 on a software company (30% net margin). Always cross-check with the Net % filter.
2. Low P/S = cheap assumption. Airlines and retailers often have P/S below 1 — but they also carry huge debt and razor-thin margins. Look at Debt-to-Equity alongside P/S.
Frequently Asked Questions
Is a low P/S ratio always good?
Not always. Very low P/S (below 0.5) sometimes signals a company with declining revenue, heavy debt, or structural problems. Combine it with margin and debt filters before drawing conclusions.