# 株価収益率(PER)

> YogoQ Core AI-readable term handoff. Preview, read-only, Reviewed/Verified only.

- Canonical URL: https://core.yogoq.com/ko-KR/core/price-earnings-ratio
- Locale: ko-KR
- Content tier: db_backed
- Quality: reviewed
- Publication status: published_reviewed
- Schema version: core-reviewed-term-ai-handoff-v2
- Compatible with: core-reviewed-term-ai-handoff-v1
- Content hash: 11134c9f6904ec41a0bdbf48ea259b82945c51a91fcbcfd8c5b65d7785f98fc9
- Trust policy: core-trust-policy-v1-2026-06-22

## Short Definition

The P/E ratio shows how much investors pay per unit of earnings.

## 一言でいうと

The P/E ratio shows how much investors pay per unit of earnings.

## 計算の考え方

Price-to-Earnings Ratio (P/E) should be calculated with a stable numerator, denominator, and time window. Formula | P/E Ratio = Market Price per Share / Earnings per Share | Use it to compare market valuation against reported earnings. Time window | Use the same period for every comparison | Prevents artificial movement Segment | Calculate by plan, market, cohort, or owner when useful | Reveals where the change came from

- Formula | P/E Ratio = Market Price per Share / Earnings per Share | Use it to compare market valuation against reported earnings.
- Time window | Use the same period for every comparison | Prevents artificial movement
- Segment | Calculate by plan, market, cohort, or owner when useful | Reveals where the change came from

## 含めるもの / 含めないもの

The boundary of Price-to-Earnings Ratio (P/E) must be written before it is used as a KPI. Include | Recurring and comparable inputs that match the definition | Keeps trend analysis reliable Exclude | One-off, unmatched, or non-comparable items | Avoids inflated or misleading movement Document | Data source, owner, refresh timing, and exception rules | Makes reviews reproducible

- Include | Recurring and comparable inputs that match the definition | Keeps trend analysis reliable
- Exclude | One-off, unmatched, or non-comparable items | Avoids inflated or misleading movement
- Document | Data source, owner, refresh timing, and exception rules | Makes reviews reproducible

## 意味

The Price-to-Earnings (P/E) ratio is share price divided by earnings per share, reflecting market expectations about growth and profitability.Because it embeds market expectations, P/E must be evaluated with growth and risk assumptions.

## 役立つ場面

It links market expectations to earnings, improving valuation decisions. Trend tracking shows how expectations shift over time. Peer comparison helps form over/undervaluation hypotheses.

- It links market expectations to earnings, improving valuation decisions.
- Trend tracking shows how expectations shift over time.
- Peer comparison helps form over/undervaluation hypotheses.

## 使い方のポイント

- Confirm the EPS definition and time period used.
- Adjust for one-time earnings effects to read sustainability.
- Interpret alongside growth and margin indicators.
- Account for capital structure and accounting differences.
- Make valuation assumptions explicit before decisions.

## 何が数字を動かすか

Price-to-Earnings Ratio (P/E) changes because the underlying operating drivers change. Volume | More or fewer units, users, customers, or transactions | Explains scale effects Mix | Change in segment, plan, product, or channel composition | Explains quality of growth or decline Efficiency | Better conversion, retention, cost control, or process discipline | Explains operating improvement

- Volume | More or fewer units, users, customers, or transactions | Explains scale effects
- Mix | Change in segment, plan, product, or channel composition | Explains quality of growth or decline
- Efficiency | Better conversion, retention, cost control, or process discipline | Explains operating improvement

## 判断するときの注意点

Do not read Price-to-Earnings Ratio (P/E) alone. Compare with companion metrics before changing budget or targets. Check whether the movement came from real performance or definition drift. Avoid optimizing the metric in a way that harms customer quality or long-term value.

- Compare with companion metrics before changing budget or targets.
- Check whether the movement came from real performance or definition drift.
- Avoid optimizing the metric in a way that harms customer quality or long-term value.

## よくある誤解 / 落とし穴

- A low P/E is not always a bargain without quality checks.
- Growth assumptions can make P/E misleading if wrong.
- It should not be used as the only decision metric.

## 最小例

Example: Compare a company's P/E to peers to assess whether growth expectations are high or low.Compute P/E using adjusted EPS and show growth and risk assumptions alongside it.Avoid simplistic comparisons across very different industries.Use multi-year averages if earnings are volatile.

## 似ている言葉との違い

Compare Price-to-Earnings Ratio (P/E) with adjacent concepts before deciding. Price-to-Earnings Ratio (P/E) | Current concept | Use when the team needs the primary decision lens Adjacent metric or framework | Supporting lens | Use when the team needs evidence or process detail General vocabulary | Broad explanation | Use only for orientation, not final decision-making

- Price-to-Earnings Ratio (P/E) | Current concept | Use when the team needs the primary decision lens
- Adjacent metric or framework | Supporting lens | Use when the team needs evidence or process detail
- General vocabulary | Broad explanation | Use only for orientation, not final decision-making

## 一緒に見る指標

Read Price-to-Earnings Ratio (P/E) together with metrics that explain quality, scale, and risk. Growth metric | Shows direction | Explains whether the trend is improving Efficiency metric | Shows cost or effort | Explains whether the result is economical Risk metric | Shows volatility or concentration | Explains whether the result is durable

- Growth metric | Shows direction | Explains whether the trend is improving
- Efficiency metric | Shows cost or effort | Explains whether the result is economical
- Risk metric | Shows volatility or concentration | Explains whether the result is durable

## Aliases

- 株価収益率(PER) (display_name, ko-KR)
- Price-to-Earnings Ratio (P/E) (english_name, en-US)
- P/E (abbreviation)
- プライス・トゥー・アーニングス・レシオ (katakana, ko-KR)
- 株価収益率(PER) (localized_title, ja-JP)

## Relations

- プロダクト(4P): related (https://core.yogoq.com/ko-KR/core/product)
- ユーザーあたり平均収益(ARPU): related (https://core.yogoq.com/ko-KR/core/average-revenue-per-user)
- 流動比率: related (https://core.yogoq.com/ko-KR/core/current-ratio)
- プライス(4P): related (https://core.yogoq.com/ko-KR/core/price)

## RAG Chunks

- core:chunk:price-earnings-ratio:ko-KR:definition:f907b9deef375fb2
- core:chunk:price-earnings-ratio:ko-KR:formula:4f86986958127e9f
- core:chunk:price-earnings-ratio:ko-KR:boundary:392b756bc2b2eb59
- core:chunk:price-earnings-ratio:ko-KR:meaning:a80981e3e6508034
- core:chunk:price-earnings-ratio:ko-KR:usage:bcf7f7b5307a5959
- core:chunk:price-earnings-ratio:ko-KR:usage:f791546d75a32dcb
- core:chunk:price-earnings-ratio:ko-KR:drivers:66111aaad7c6fc7a
- core:chunk:price-earnings-ratio:ko-KR:misunderstandings:d764f90ec4066a58
- core:chunk:price-earnings-ratio:ko-KR:misunderstandings:59ebb1d65629f749
- core:chunk:price-earnings-ratio:ko-KR:examples:fbdc8915116817f3
- core:chunk:price-earnings-ratio:ko-KR:comparisons:b47197f4e3c19f99
- core:chunk:price-earnings-ratio:ko-KR:related_metrics:78e1184e1b1fccab
- core:chunk:price-earnings-ratio:ko-KR:faq:d311c931e50ae1ee
- core:chunk:price-earnings-ratio:ko-KR:faq:93f8066eb77a2c7e
- core:chunk:price-earnings-ratio:ko-KR:faq:42b5d23143b716f4

## FAQ

### When should I use Price-to-Earnings Ratio (P/E)?

Use it when the team needs to decide scope, priority, owner, or trade-off, not when it only needs a short definition.

### What makes Price-to-Earnings Ratio (P/E) useful in practice?

It becomes useful when it is tied to evidence, a decision owner, and a concrete next operating choice.

### What should I avoid?

Avoid using the term as a label without clarifying assumptions, boundaries, and how success will be judged.

## Sources

- Principles of Finance (OpenStax) - https://openstax.org/details/books/principles-of-finance
- Principles of Marketing (Open Textbook Library) - https://open.umn.edu/opentextbooks/textbooks/principles-of-marketing
- Principles of Management (OpenStax) - https://openstax.org/details/books/principles-management

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