The formula is simple; input eligibility is the work公式简单，输入资格才是工作
P/E = share price ÷ EPS. Label the exact price date and trailing earnings period. EPS must match the claim: profit attributable to ordinary shareholders divided by corresponding basic or diluted weighted-average shares. A normalized P/E is an analyst or management measure, not the reported multiple; start with reported earnings and show every after-tax adjustment. Market capitalization ÷ earnings is equivalent only when market capitalization uses the same share count embedded in EPS. Negative earnings make conventional P/E not meaningful; near-zero earnings make it unstable. Earnings yield is the reciprocal—EPS ÷ price or 1 ÷ P/E—and inherits the same denominator problems.
P/E = 每股价格 ÷ EPS。若计算滚动市盈率，要标出精确价格日期与盈利期间，例如截至最近报告日的十二个月。EPS 必须与主张匹配：归属普通股股东的利润除以对应基本或稀释加权平均股数。基本 P/E 与稀释 P/E 不同，是因为分母不同。正常化 P/E 属于分析者或管理层指标，并非报告倍数；应从报告盈利出发，逐项展示税后调整，并保留不调整经常项目的版本。总市值 ÷ 盈利只有在总市值采用 EPS 中同一股数时才与每股公式代数等价。盈利为负时，传统 P/E 不具意义；盈利接近零时，倍数极不稳定。盈利收益率是其倒数，即 EPS ÷ 价格或 1 ÷ P/E，并继承相同分母问题。
Stamp the numerator and denominator with different clocks给分子和分母盖上不同的时钟印章
| Input | Time property | Required label | Mismatch to avoid |
|---|---|---|---|
| Share price | Point in time | Closing price, date, currency, share class, adjusted or unadjusted | Using today’s price without a recorded timestamp |
| TTM earnings | Flow over 12 months | Start and end dates, continuing or total operations, attribution | Combining a calendar price with stale or overlapping earnings |
| Weighted-average shares | Period-weighted denominator | Basic or diluted, same earnings period | Using period-end shares as though they were the annual average |
| Adjustments | Belong to identified periods | Gross amount, tax effect, after-tax amount, reason | Removing a current item without treating comparable prior items consistently |
| 输入 | 时间属性 | 必备标签 | 必须避免的错配 |
|---|---|---|---|
| 每股价格 | 时点数 | 收盘价、日期、币种、股份类别、复权或未复权 | 使用“今天价格”却不记录时间戳 |
| TTM 盈利 | 十二个月期间流量 | 起止日、持续经营或全部经营、归属 | 把日历时点价格与陈旧或重叠盈利混用 |
| 加权平均股数 | 期间加权分母 | 基本或稀释、与盈利同一期间 | 把期末股数当作全年平均股数 |
| 调整项 | 归属明确期间 | 税前金额、税影响、税后金额、理由 | 剔除本期项目却不一致处理上期同类项目 |
A trailing convention pairs a dated price with the preceding 12 months of earnings. The inputs are not simultaneous: price can reflect information published after much of the earnings arose. Write “$24.00 at the December 31, 20X5 close ÷ diluted EPS for the year then ended,” not simply “P/E 27.” State any gap between the latest report and price date.
常见滚动口径把注明日期的市场价格，与此前连续十二个月盈利配对，但两者并不因此同时发生：价格可能已经反映大部分盈利产生之后才发布的信息。应写“20X5 年 12 月 31 日收盘价 24.00 美元 ÷ 截至该日年度稀释 EPS”，而不是只写“P/E 27 倍”。若最新季度截止 9 月 30 日而价格取 12 月 31 日，还要明确三个月信息差。
Every RoadReach price and financial figure below is invented for calculation. The $24.00 price is fixed at December 31, 20X5 and must not be refreshed or treated as a current market value.
虚构价格，不是实时行情下文 RoadReach 的价格与财务数字均为教学假设。24.00 美元价格固定在 20X5 年 12 月 31 日，不得更新或视为当前市场价值。
Make the EPS denominator show its passport要求 EPS 分母出示口径护照
| Passport field | RoadReach fictional input | Why it matters |
|---|---|---|
| Entity and attribution | $48m consolidated net income attributable to common shareholders | P/E is an equity-holder measure; noncontrolling and preferred claims cannot remain in numerator by accident |
| Operations | Total operations; no discontinued operation in the example | Continuing-operations EPS answers a different question from total EPS |
| Basic shares | 50m weighted average | Reflects ordinary shares outstanding during the year |
| Potential dilution | 4m incremental shares from dilutive awards | Options or other instruments can reduce EPS when inclusion is dilutive |
| Diluted shares | 54m weighted average | Matches the reported diluted numerator and period |
| Current shares | 44m at December 31 after a July 1 repurchase | A point-in-time count, not a substitute for weighted-average shares |
| 护照字段 | RoadReach 虚构输入 | 重要性 |
|---|---|---|
| 主体与归属 | 4,800 万美元合并净利润，归属普通股股东 | P/E 是权益持有人指标；不能意外保留非控制性权益或优先权利对应盈利 |
| 经营范围 | 全部经营；案例不存在终止经营 | 持续经营 EPS 与总 EPS 回答不同问题 |
| 基本股数 | 5,000 万加权平均股 | 反映年度内实际在外普通股 |
| 潜在稀释 | 稀释性奖励增加 400 万增量股 | 期权等工具在具有稀释性时会降低 EPS |
| 稀释股数 | 5,400 万加权平均股 | 与报告稀释分子及期间匹配 |
| 当前股数 | 7 月 1 日回购后，12 月 31 日为 4,400 万股 | 这是时点股数，不能替代加权平均股数 |
RoadReach begins 20X5 with 56m shares and repurchases 12m on July 1, leaving 44m at year-end. Basic weighted-average shares are 56m × 6/12 + 44m × 6/12 = 50m. Reported basic EPS is $48m ÷ 50m = $0.96. With 4m incremental dilutive shares, diluted EPS is $48m ÷ 54m = $0.8889. The basic P/E is $24 ÷ $0.96 = 25.0×; diluted P/E is $24 ÷ $0.8889 = 27.0×.
RoadReach 在 20X5 年初有 5,600 万股，7 月 1 日回购 1,200 万股，年末剩 4,400 万股。基本加权平均股数 =5,600 万 ×6/12 +4,400 万 ×6/12 =5,000 万股。报告基本 EPS =4,800 万 ÷5,000 万 =0.96 美元。再加入 400 万增量稀释股，稀释 EPS =4,800 万 ÷5,400 万 =0.8889 美元。基本 P/E =24÷0.96=25.0 倍；稀释 P/E =24÷0.8889=27.0 倍。
The buyback shows denominator mechanics, not free value creation. With $48m earnings and 56m shares all year, basic EPS would be $0.8571; the 50m weighted denominator raises it to $0.96, or 12.0%, before the $216m fictional cash cost, lost interest, borrowing, or price paid. Economic analysis must include those effects.
回购只用来说明分母机制，并不代表免费创造价值。若盈利仍为 4,800 万且全年保持 5,600 万股，基本 EPS 将为 0.8571 美元；改用 5,000 万加权分母后升至 0.96 美元，即提高 12.0%。但这尚未考虑虚构回购现金成本 2.16 亿美元、损失利息、新增借款或支付价格。经济分析必须加入这些影响，报告 EPS 分母仍按会计规则计算。
Calculate three P/E results from one price without mixing them用同一价格计算三种 P/E，但绝不混用
RoadReach is a fictional roadside-assistance service. Reported attributable net income of $48m includes a $12m one-time tax benefit and a $4m after-tax restructuring charge. The normalization below is an analyst assumption. It does not assert that restructuring is nonrecurring, and it does not alter reported earnings.
虚构盈利调整RoadReach 是虚构道路救援服务商。归属普通股股东的报告净利润 4,800 万美元，包含 1,200 万一次性税收益与 400 万税后重组费用。以下正常化属于分析假设，不断言重组不会重复，也不改写报告盈利。
| Earnings view | Earnings / shares | EPS | P/E at $24 |
|---|---|---|---|
| Reported basic | $48m / 50m basic weighted shares | $0.9600 | 25.0× |
| Reported diluted | $48m / 54m diluted weighted shares | $0.8889 | 27.0× |
| Analyst-normalized diluted | ($48m − $12m tax benefit + $4m after-tax restructuring) / 54m | $0.7407 | 32.4× |
| Conservative diluted: restructure not adjusted | ($48m − $12m tax benefit) / 54m | $0.6667 | 36.0× |
| 盈利视角 | 盈利 / 股数 | EPS | 按 24 美元计算 P/E |
|---|---|---|---|
| 报告基本口径 | 4,800 万 /5,000 万基本加权股 | 0.9600 美元 | 25.0 倍 |
| 报告稀释口径 | 4,800 万 /5,400 万稀释加权股 | 0.8889 美元 | 27.0 倍 |
| 分析者正常化稀释口径 | （4,800 万 −1,200 万税收益 +400 万税后重组）/5,400 万 | 0.7407 美元 | 32.4 倍 |
| 保守稀释口径：不调整重组 | （4,800 万 −1,200 万税收益）/5,400 万 | 0.6667 美元 | 36.0 倍 |
Removing a gain reduces normalized earnings and raises P/E; adding back a charge does the reverse. Reported diluted 27.0× uses fictional source inputs; 32.4× and 36.0× express judgments about earning power. “One-time” does not decide an adjustment: examine recurrence, cash effect, business necessity, tax treatment, and comparable-period policy. Treat gains and charges symmetrically and label normalized EPS.
剔除收益会降低正常化盈利并提高 P/E，回加费用则相反。报告稀释 27.0 倍来自类似经审计的虚构输入；32.4 倍与 36.0 倍则包含对盈利能力的判断。“一次性”标签不能自动决定是否调整，还要看重复发生、现金影响、业务必要性、税务处理与可比期间政策。收益与费用必须对称展示，正常化 EPS 也不能冒用报告标签。
Quarterly EPS may use different weighted shares and dilutive-instrument treatment. Build TTM earnings from compatible quarterly numerators and determine the matching denominator under the applicable rules, or use a reported full-year EPS when periods align. Do not mix overlapping annual and interim amounts.
TTM EPS 不总是四个季度 EPS 的简单相加各季度 EPS 可能使用不同加权股数与稀释工具处理。应从兼容季度分子建立 TTM 盈利，并按适用规则确定匹配分母；若期间一致，也可使用报告全年 EPS。不能混合重叠年度与中期数字。
Prove the market-cap equivalence with the same share count用同一股数证明总市值等价式
If EPS = E ÷ S, then P ÷ EPS = P ÷ (E ÷ S) = (P × S) ÷ E. The term P × S is an equity value only when S is the share count chosen for the same EPS. Changing S breaks numerical equivalence even though every input may be individually correct.
带条件的代数若 EPS = E ÷ S，则 P ÷ EPS = P ÷（E ÷ S）=（P × S）÷ E。只有 S 与该 EPS 使用同一股数时，P × S 才形成匹配权益价值。更换 S 会破坏数值等价，即使每个输入单独看都正确。
| Equity-value construction | Value at $24 | Value ÷ $48m earnings | Matches |
|---|---|---|---|
| Price × 50m basic weighted shares | $1,200m | 25.0× | Basic P/E |
| Price × 54m diluted weighted shares | $1,296m | 27.0× | Diluted P/E arithmetic |
| Price × 44m current shares outstanding | $1,056m current market capitalization | 22.0× | Neither annual basic nor diluted P/E |
| 权益价值构造 | 按 24 美元的价值 | 价值 ÷4,800 万盈利 | 匹配对象 |
|---|---|---|---|
| 价格 ×5,000 万基本加权股 | 12.00 亿美元 | 25.0 倍 | 基本 P/E |
| 价格 ×5,400 万稀释加权股 | 12.96 亿美元 | 27.0 倍 | 稀释 P/E 算术 |
| 价格 ×4,400 万期末在外股 | 10.56 亿美元当前总市值 | 22.0 倍 | 既不匹配年度基本也不匹配稀释 P/E |
Market capitalization commonly uses current shares, while reported EPS uses weighted-average shares. A midyear repurchase exposes the difference. The fictional $1,056m current market cap is valid at year-end, but dividing it by annual earnings does not reproduce reported annual P/E. Reconcile issuances, repurchases, splits, options, convertibles, and dates before declaring equivalence.
市场数据服务通常用当前股数构造总市值，而报告 EPS 使用加权平均股数。年中大额回购会放大差异。按虚构输入，10.56 亿美元当前总市值是有效时点数字，但除以年度盈利不能复现报告年度每股倍数。声称两个 P/E 公式等价前，应调节股份发行、回购、拆股、期权、可转债与计量日期。
Mark the zone where P/E loses explanatory power标出 P/E 失去解释力的区域
| Earnings condition at $24 | Diluted EPS | Arithmetic result | Usable statement |
|---|---|---|---|
| $48m earnings / 54m shares | $0.8889 | 27.0× | Defined reported diluted P/E |
| $5m earnings / 54m shares | $0.0926 | 259.2× | Positive but highly sensitive to small earnings changes |
| $0 earnings | $0 | Division undefined | P/E not meaningful |
| −$10m loss / 54m shares | −$0.1852 | −129.6× mechanically | Conventional P/E not meaningful; do not rank it |
| 按 24 美元的盈利状态 | 稀释 EPS | 算术结果 | 可使用的表述 |
|---|---|---|---|
| 4,800 万盈利 /5,400 万股 | 0.8889 美元 | 27.0 倍 | 已定义报告稀释 P/E |
| 500 万盈利 /5,400 万股 | 0.0926 美元 | 259.2 倍 | 虽为正但对小幅盈利变化高度敏感 |
| 盈利为 0 | 0 | 除法未定义 | P/E 不具意义 |
| 亏损 1,000 万 /5,400 万股 | −0.1852 美元 | 机械结果 −129.6 倍 | 传统 P/E 不具意义，不能据此排序 |
Near zero, the denominator dominates the multiple. Raising earnings from $5m to $7m lifts diluted EPS to $0.1296 and reduces P/E from 259.2× to 185.1× at the same price. Negative P/E is not “cheaper.” Losses, troughs, impairments, tax anomalies, or changing capital structures may require another analytical lens; this page does not choose one.
接近零时，倍数主要由分母而非价格支配。若盈利从 500 万增至 700 万美元，稀释 EPS 会升至 0.1296 美元，P/E 在价格不变时从 259.2 倍降至 185.1 倍。负 P/E 并不比正 P/E “更便宜”。亏损、周期谷底、初创阶段、大额减值、税务异常与资本结构变化可能需要不同分析视角，但本页不选择替代估值方法。
| Reciprocal view | Formula | RoadReach result |
|---|---|---|
| Reported diluted earnings yield | $0.8889 ÷ $24 = 1 ÷ 27.0 | 3.70% |
| Analyst-normalized diluted earnings yield | $0.7407 ÷ $24 = 1 ÷ 32.4 | 3.09% |
| 倒数视角 | 公式 | RoadReach 结果 |
|---|---|---|
| 报告稀释盈利收益率 | 0.8889÷24 =1÷27.0 | 3.70% |
| 分析者正常化稀释盈利收益率 | 0.7407÷24 =1÷32.4 | 3.09% |
Earnings yield expresses the same relationship in percentage form; it is not a cash yield or promised return. The reported and normalized yields differ because their EPS denominators differ. If EPS is negative, the reciprocal does not repair the metric. Keep attribution, share basis, period, and adjustments attached exactly as with P/E.
盈利收益率只是把相同关系表示为百分比，不是现金收益率，也不是承诺回报。报告与正常化收益率不同，是因为 EPS 分母不同。若 EPS 为负，取倒数也不能修复指标。它与 P/E 一样，必须携带归属、股数基础、期间与调整。
Report one primary multiple and label every alternative报告一个主要倍数，并标记所有替代口径
The fictional price date, attributable earnings, basic and diluted weighted shares, current shares, tax item, and restructuring charge are source inputs.
报告事实虚构价格日期、归属盈利、基本与稀释加权股数、当前股数、税项目及重组费用属于来源输入。
Reported basic 25.0×, reported diluted 27.0×, earnings yields, and matched equity-value equivalents reproduce from unrounded inputs.
计算报告基本 25.0 倍、报告稀释 27.0 倍、盈利收益率和匹配权益价值等价式均可用未舍入输入复算。
Price, absence of discontinued operations, isolated buyback effect, and all RoadReach figures are invented.
假设价格、不存在终止经营、隔离回购影响及所有 RoadReach 数字均为虚构。
Whether restructuring should be adjusted determines normalized diluted P/E of 32.4× or 36.0×.
判断与不确定性是否调整重组费用，决定正常化稀释 P/E 是 32.4 倍还是 36.0 倍。
A controlled statement reads: “At the fictional December 31, 20X5 price of $24.00, RoadReach trades at 27.0× reported diluted EPS for the year then ended. Reported basic P/E is 25.0× because its weighted share count is lower. Removing a $12m tax benefit and adding back a $4m after-tax restructuring charge produces an analyst-normalized 32.4×; treating restructuring as recurring gives 36.0×. Current market capitalization divided by annual earnings is 22.0× because current shares do not match either annual EPS denominator. These are definitions and calculations, not a conclusion that any multiple is good, bad, cheap, or expensive.”
可控表述可以写成：“按虚构 20X5 年 12 月 31 日价格 24.00 美元，RoadReach 相对于截至该日年度报告稀释 EPS 的 P/E 为 27.0 倍。因加权股数较低，报告基本 P/E 为 25.0 倍。剔除 1,200 万税收益并回加 400 万税后重组费用后，分析者正常化 P/E 为 32.4 倍；若把重组视为经常项目，则为 36.0 倍。当前总市值除以年度盈利为 22.0 倍，因为当前股数不匹配任何一个年度 EPS 分母。这些是定义与计算，不代表任何倍数好、坏、便宜或昂贵。”
Upload the price record and every denominator source上传价格记录与每一项分母来源
Upload the complete annual and interim filings covering the chosen TTM period; income statements; EPS numerator and basic-to-diluted share reconciliations; noncontrolling interest and preferred claims; continuing and discontinued operations; stock compensation, options, convertibles, repurchases, issuance, splits, and subsequent-event notes; tax-rate reconciliation; restructuring, impairment, disposal, and acquisition notes; management non-GAAP reconciliation; and a dated price record identifying currency, share class, close, and adjustment basis. Do not ask the tool to invent or refresh a live price.
Ask Stock Explained to return each input with file, page, note, table, row, period, date, currency, unit, attribution, and reported-or-adjusted label. Require separate basic, diluted, and normalized calculations using unrounded values, plus a share-count reconciliation for any market-cap version. Then open every locator in the uploaded originals. Verify TTM quarters do not overlap, numerator and denominator cover the same entity and period, tax effects are explicit, gains and charges are symmetric, anti-dilutive treatment follows the source, and the quoted price matches the declared date. Leave unavailable prices or adjustment support unresolved.
上传覆盖所选 TTM 的完整年报与季报、利润表、EPS 分子及基本到稀释股数调节、非控制性权益与优先权利、持续与终止经营、股份薪酬/期权/可转债/回购/发行/拆股/期后事项附注、税率调节、重组/减值/处置/收购附注、管理层非 GAAP 调节，以及注明币种、股份类别、收盘与复权基础的价格日期记录。不要要求工具编造或刷新实时价格。
要求 Stock Explained 为每个输入返回文件、页码、附注、表格、行、期间、日期、币种、单位、归属与报告或调整标签；使用未舍入数值分别计算基本、稀释与正常化口径，并为任何总市值版本提供股数调节。随后在上传原件中逐个打开定位，核验 TTM 季度没有重叠，分子分母覆盖同一主体与期间，税影响明确，收益与费用对称，反稀释处理遵循来源，报价匹配声明日期。无法取得的价格或调整支持必须保持未解决。
Upload the dated price, EPS note, share reconciliation, and one-off disclosures; verify every input in the original documents before using the multiple.
上传注明日期的价格、EPS 附注、股数调节与一次性项目披露，并在使用倍数前到原件核验每个输入。
Open Stock Explained打开“一眼看懂这只股票”Questions after the numerator and denominator match分子与分母匹配后的常见问题
Label the choice. Basic P/E uses basic EPS; diluted P/E uses diluted EPS and captures applicable potential ordinary shares. RoadReach is 25.0× basic and 27.0× diluted at the same price. Do not call one simply “the P/E” when the distinction is material.
P/E 应使用基本还是稀释 EPS？必须标出口径。基本 P/E 使用基本 EPS；稀释 P/E 使用稀释 EPS，并纳入适用潜在普通股。相同价格下 RoadReach 基本为 25.0 倍、稀释为 27.0 倍。差异重大时，不能把其中一个简称为唯一 P/E。
The algebra requires the same share count. RoadReach current market cap uses 44m year-end shares, while annual EPS uses 50m basic or 54m diluted weighted shares. Matching the share count restores 25.0× or 27.0×; mixing it produces 22.0×.
为何总市值除以盈利会不同于股价除以 EPS？代数等价要求同一股数。RoadReach 当前总市值使用 4,400 万期末股，而年度 EPS 使用 5,000 万基本或 5,400 万稀释加权股。匹配股数后恢复 25.0 或 27.0 倍；混用则得到 22.0 倍。
For reported P/E, no: use reported EPS. A normalized view may remove it if the purpose and tax treatment are clear, but retain the reported result and treat comparable gains and charges consistently. The adjustment is a judgment, not a restatement.
一次性税收益应从 EPS 中剔除吗？报告 P/E 不剔除，应使用报告 EPS。正常化视角可以在目的与税处理明确时剔除，但必须保留报告结果，并一致处理可比收益与费用。该调整是判断，不是重述。
The mechanical quotient may be negative, but conventional P/E is not meaningful because a loss is not a positive earnings claim on price. Do not interpret a more negative number as cheaper or rank loss-making companies by negative P/E.
负 P/E 意味着什么？机械商数可以为负，但传统 P/E 不具意义，因为亏损不是价格对应的正盈利要求。不能把更负的数字解释为更便宜，也不能按负 P/E 给亏损公司排序。
It is the reciprocal presentation: EPS ÷ price = 1 ÷ P/E when inputs match. RoadReach reported diluted yield is 3.70%. It is not cash paid to shareholders or a promised return, and negative or distorted earnings remain problematic.
盈利收益率提供了不同于 P/E 的信息吗？在输入匹配时，它只是倒数呈现：EPS ÷ 价格 =1÷P/E。RoadReach 报告稀释盈利收益率为 3.70%。它不是付给股东的现金或承诺回报，负盈利或失真盈利的问题仍然存在。
Primary sources for P/E, EPS, and adjusted earningsP/E、EPS 与调整盈利的一手来源
The sources support the P/E definition, EPS attribution and weighted-share principles, periodic filing locations, and the need to label and reconcile non-GAAP measures. Exact calculations depend on accounting framework, share instruments, jurisdiction, corporate actions, filing dates, and effective rules. They do not validate fictional RoadReach or its price.
This page is educational, not accounting, tax, legal, market-data, valuation, or individualized investment advice. P/E and earnings yield do not alone measure cash generation, debt, growth, risk, fair value, or future returns.
以上来源支持 P/E 定义、EPS 归属与加权股数原则、定期申报定位，以及非 GAAP 指标需要标记并调节。准确计算取决于会计框架、股份工具、司法辖区、公司行动、申报日期与有效规则；这些来源不验证虚构 RoadReach 或其价格。
本页仅供学习，不构成会计、税务、法律、市场数据、估值或个性化投资建议。P/E 与盈利收益率不能单独衡量现金创造、债务、增长、风险、公允价值或未来回报。