What Is a “Good” P/E Ratio? And Why That’s the Wrong Question to Be Asking
If you’ve ever tried to understand the stock market, you’ve likely come across the P/E ratio — and immediately wondered: Is higher better? Or lower? What’s “good”?
Let’s clear something up right away.
This isn’t about memorizing a number.
It’s about understanding what you’re actually looking at — and what it’s trying to tell you.
Because just like in medicine, when we reduce complex systems down to a single number without context, we miss the bigger picture.
Data without context leads to confusion. Insight comes from understanding the system as a whole.
First — What Is the P/E Ratio, Really?
At its core, the price-to-earnings (P/E) ratio is simple:
How much are you paying for each dollar a company earns?
It’s calculated by dividing a company’s stock price by its earnings per share.
So if a company has a P/E of 20, that means investors are willing to pay $20 for every $1 of earnings.
Think of it like this:
You’re not just buying a stock — you’re buying a stream of earnings. The P/E ratio tells you how expensive that stream is.
So… Is a Lower P/E Better?
This is where most people get tripped up.
A lower P/E can suggest a stock is cheaper.
A higher P/E can suggest it’s more expensive.
But that doesn’t automatically make one better than the other.
Because price — in any context — is meaningless without understanding why it’s priced that way.
A low P/E might mean:
The company is undervalued
Or the market expects its earnings to decline
Or there are underlying risks you’re not seeing yet
A high P/E might mean:
The stock is overpriced
Or the company is growing rapidly and investors expect future earnings to rise
Sound familiar?
This is no different than looking at a lab result in isolation. A number alone doesn’t diagnose — context does.
What’s Considered a “Normal” Range?
Broadly speaking, many investors consider a P/E between 20–25 to be around market average.
But here’s the nuance most people miss:
There is no universal “good” P/E ratio.
What matters is:
The industry
The company’s growth rate
Its financial health
And what the market is expecting next
Comparing a fast-growing tech company to a stable utility company using the same P/E lens is like comparing completely different biological systems — the baseline isn’t the same.
Why the P/E Ratio Can Be Misleading
This is where I want you to slow down and think more critically.
Because the P/E ratio is often treated like a shortcut — and shortcuts can lead to poor decisions.
Here’s what it doesn’t tell you:
1. How those earnings are calculated
Companies report earnings differently. Accounting choices matter. Some numbers are cleaner than others.
2. Whether those earnings are sustainable
A company can look profitable on paper while underlying issues are building.
3. What’s coming next
The P/E ratio is often backward-looking — unless you’re specifically using projections.
Forward vs. Trailing P/E — Why It Matters
There are actually two main ways to look at P/E:
Trailing P/E: Based on the past 12 months of earnings
Forward P/E: Based on projected future earnings
And they can tell completely different stories.
If a company has:
A high trailing P/E but a lower forward P/E → earnings are expected to grow
A low trailing P/E but higher forward P/E → earnings may be declining
Again, this isn’t about the number. It’s about the trend.
What a Negative P/E Ratio Means
If you see a negative P/E, it simply means the company isn’t profitable — it’s losing money.
That’s not automatically a red flag.
Some companies invest heavily in growth before becoming profitable.
But if losses persist over time, that’s when you need to pay closer attention.
The Biggest Mistake Investors Make
The most common error I see?
People assume:
Low P/E = good investment
High P/E = bad investment
That’s an oversimplification — and it can cost you.
A low P/E stock can be cheap for a reason.
A high P/E stock can be expensive for a reason.
Your job isn’t to chase “cheap.”
It’s to understand value.
What You Should Be Looking At Instead
The P/E ratio is a starting point — not a decision.
To actually understand a company, you need to look deeper:
Is revenue growing?
Are profits consistent?
How much debt is the company carrying?
Is cash flow strong?
What’s happening in the broader industry?
This is the difference between reacting to numbers and interpreting them.
The Bottom Line
A “good” P/E ratio doesn’t exist in isolation.
It depends on:
The company
The industry
The timing
And the expectations built into the price
The real question isn’t:
“Is this P/E high or low?”
It’s:
“Does this valuation make sense based on what’s actually happening here?”
Because whether we’re talking about health or wealth, the principle is the same:
Data without context leads to confusion.
Insight comes from understanding the system as a whole.
And that’s where better decisions begin.
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Financial Disclaimer: The information contained in this blog is provided for informational and educational purposes only and does not constitute financial, investment, tax, or legal advice. The content should not be relied upon as a basis for making any financial decisions. Before making any financial decisions, you should consult with a qualified financial advisor, accountant, or attorney who can assess your individual circumstances. The author(s) and publisher of this newsletter are not licensed financial advisors and accept no liability for any loss or damage arising from reliance on the information provided.
