What Is the P/E Ratio? Formula, Meaning and Forward P/E
The price-to-earnings ratio shows how many times a company's earnings per share investors are paying for its stock. A lower number does not automatically mean cheaper: industry, growth and earnings quality matter.
P/E ratio formula
PER = Share price ÷ Earnings per share (EPS)
If a share trades at 3,000 and EPS is 200 in the same currency, P/E is 3,000 ÷ 200 = 15x. With consistent share counts, market capitalisation ÷ net income expresses the same relationship.
Calculate P/E
Use the same currency for price and EPS
Result
3000 ÷ 200
15.0x
Current P/E levels in Japan
Price date: October 20, 2026
Trailing P/E median
13.6x
Based on trailing 12-month earnings
25th percentile
9.7x
25% of valid stocks are at or below this level
75th percentile
19.9x
75% of valid stocks are at or below this level
Stocks with valid P/E
3,304 / 3,958
654 stocks excluded for losses, zero earnings or missing data
Trailing P/E distribution
Read this together with the median and quartiles, which are less sensitive to outliers than the mean.
Trailing vs forward P/E
The same share price produces a different P/E when the earnings denominator changes.
- Trailing P/E (TTM)
- 13.6x
- n = 3,304
- Forward P/E (company guidance)
- 14.4x
- n = 3,363
Median trailing P/E by sector
Sectors with at least 10 valid stocks. Profitability, growth and cyclicality differ, so peer comparison should come first.
Examples from large-cap stocks
This is not a recommendation ranking. It shows how trailing and forward P/E change with the earnings basis.
- Price
- ¥3,351-3.65%
- TTM EPS
- 237.38
- Trailing P/E
- 14.1x
- Forward P/E
- -
- Price
- ¥3,102+0.00%
- TTM EPS
- 351.38
- Trailing P/E
- 8.8x
- Forward P/E
- 12.3x
- Price
- ¥18,800+0.13%
- TTM EPS
- 411.29
- Trailing P/E
- 45.7x
- Forward P/E
- 42.1x
- Price
- ¥5,810+0.64%
- TTM EPS
- 176.99
- Trailing P/E
- 32.8x
- Forward P/E
- 30.8x
- Price
- ¥4,554-6.01%
- TTM EPS
- 860.66
- Trailing P/E
- 5.3x
- Forward P/E
- -
- Price
- ¥33,870-1.68%
- TTM EPS
- 633.28
- Trailing P/E
- 53.5x
- Forward P/E
- 52.8x
- Price
- ¥3,148-3.85%
- TTM EPS
- 223.07
- Trailing P/E
- 14.1x
- Forward P/E
- 14.1x
- Price
- ¥75,360+2.04%
- TTM EPS
- 1,768.08
- Trailing P/E
- 42.6x
- Forward P/E
- 41.3x
Trailing P/E vs forward P/E
Always align the earnings period used in the denominator before comparing P/E ratios.
- Trailing P/E (TTM)
- Earnings basis
- Actual EPS over the last 12 months
- Strength
- Uses reported, realised earnings
- Caution
- Can lag at an earnings turning point
- Forward P/E
- Earnings basis
- Current-year EPS from company guidance
- Strength
- Reflects expected earnings growth or decline
- Caution
- Sensitive to revisions and guidance style
How to read high and low P/E
When P/E is low
Current earnings are high relative to the price, which can look cheap. But low P/E may also signal expected decline, peak cyclical earnings or temporary gains.
When P/E is high
The price may reflect expected growth, quality or stability. Because disappointment can compress the multiple, check earnings growth and the credibility of forecasts.
A practical comparison order
- 1Compare with the same sector
- 2Compare with the stock's own history
- 3Pair with EPS growth and ROE
- 4Review guidance assumptions and delivery
When P/E is not useful
- EPS is zero or negative because the company is loss-making
- One-off gains or losses push earnings far from a normal level
- An early-stage business should be assessed on growth and investment phase
- Sector-specific earnings swings dominate, as in financials or cyclicals
Metrics to consider instead
PBR / PSR / EV/EBITDA / ROE / FCF
Every metric has limits. Combine valuation with business quality, balance-sheet strength and growth.
How Stock Club calculates and aggregates P/E
- Trailing P/E uses the latest closing price and trailing 12-month EPS.
- Forward P/E uses current-year EPS from company guidance.
- Share price and per-share earnings are aligned for stock splits.
- Market statistics cover active Japanese EQUITY records and exclude ETFs and REITs.
- Zero, negative and missing P/E values are excluded from quartiles and distributions.
- Prices are not real time; the applicable date appears with the market data.
This page is for information only and does not recommend any security. Do not make investment decisions from a single displayed metric; review company disclosures and current information.
P/E ratio FAQ
What P/E ratio is considered cheap?
There is no universal cutoff. Compare companies in the same industry and growth stage, and compare a stock with its own history. Temporarily high earnings can make P/E look deceptively low.
Why can P/E be negative?
A negative EPS means the company is loss-making. A negative multiple is not useful for comparison, so it is normally shown as N/A and paired with measures such as P/B, P/S and balance-sheet strength.
Should I use trailing or forward P/E?
Use both. Trailing P/E uses confirmed earnings from the last 12 months; forward P/E uses current company guidance. A large gap calls for a closer look at expected earnings growth and forecast credibility.
Does a high P/E mean I should avoid a stock?
Not necessarily. High P/E may reflect expected growth. It can be justified if earnings deliver, but the downside can be significant when growth falls short.
Can I compare P/E across countries?
The ratio is comparable in form, but interest rates, industry mix, accounting, growth and market risk differ. Peer comparison is usually more informative than a simple market-wide comparison.
Put P/E into practice
Use Stock Club's screener to combine P/E, forward P/E, P/B, ROE and growth metrics across Japanese and US stocks.