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P/E Ratio: Definition, Interpretation, and Examples

The price-to-earnings (P/E) ratio is a fundamental valuation metric used to determine whether a stock is overvalued or undervalued. It represents the amount an investor is willing to pay for each dollar of a company's earnings. A high P/E ratio could suggest that a stock is overvalued or that investors are expecting high growth in the future. Conversely, a low P/E ratio might indicate undervaluation or slower growth expectations. Comparing a company's P/E ratio to its peers or its historical P/E can provide valuable insights. For example, this page references three high-profile stocks to provide examples of P/E ratio interpretation.

Resposta Rápida This page provides a guide to understanding the price-to-earnings (P/E) ratio, a key valuation metric used to assess if a stock is overvalued or undervalued. The P/E ratio is calculated by dividing a company's stock price by its earnings per share (EPS), indicating how much investors pay for each dollar of earnings.
Examples3Screens60Average score77.00Updated2026-04-10Prices as ofOct 26, 2026 session

Os números vêm da Financial Modeling Prep (FMP). Se a FMP não tiver um número para um ticker, um preço ou dado fundamental pode vir do Yahoo Finance como alternativa, ou um preço da Alpaca como alternativa. A SEC EDGAR é usada apenas para links de arquivamentos e dados de identificação da empresa (razão social, endereço), nunca para números.

O MoonshotScore V2 avalia de 0 a 100 as empresas elegíveis listadas nos EUA em relação aos pares do setor em cinco pilares: qualidade do negócio (peso 26), segurança financeira (peso 20), avaliação (peso 18), durabilidade do crescimento (peso 16) e momentum (peso 12). Não usa dados de sentimento de notícias nem de analistas, e não é uma probabilidade de retornos futuros.

20.000+ US companies analyzed

Understanding the Price-to-Earnings (P/E) Ratio

The price-to-earnings (P/E) ratio is a key valuation metric that compares a company's stock price to its earnings per share (EPS). It provides investors with insight into how much the market is willing to pay for each dollar of reported earnings. This guide offers an overview of the P/E ratio, its calculation, interpretation, and limitations.

Worked Example: These Figures Today

The companies used as examples above, with the current figures behind them. Illustrations of the metric — not a ranking, not a shortlist, and not a recommendation.

Example companies for this topic, listed in the order the guide introduces them — prices, day change and market cap as of the Oct 26, 2026 trading session (FMP quote); P/E and MoonshotScore from our latest stored data. Source: Financial Modeling Prep, Yahoo Finance.
Ticker Company Price Change Market Cap MoonshotScore
AAPL Apple Inc. $343.91 -1.10% $5.0T 89
MSFT Microsoft Corporation $532.60 +1.54% $4.0T 85
TSLA Tesla, Inc. $391.62 +5.21% $1.5T 57

P/E Ratio in Context: Examples

Here are some well-known companies and their P/E ratios, for illustrative purposes: * **AAPL:** Apple Inc. * **MSFT:** Microsoft Corporation * **TSLA:** Tesla, Inc.
“O MoonshotScore V2 pontua de 0 a 100 ações ordinárias e ADRs elegíveis da NASDAQ, NYSE e AMEX em comparação com pares do setor, em cinco pilares: qualidade do negócio, segurança financeira, avaliação, durabilidade do crescimento e momentum. ETFs, títulos OTC e listagens fora dos EUA ficam excluídos. Uma pontuação V2 ausente não é substituída por V1. É uma ferramenta de pesquisa, não aconselhamento financeiro.”
— Stock Expert AI published methodology (how MoonshotScore works)

Questions worth resolving before acting on the screen

What does a high P/E ratio indicate?

A high P/E ratio may suggest that a stock is overvalued, or that investors anticipate higher earnings growth in the future. It's important to compare the P/E ratio to those of competitors and industry benchmarks.

What does a low P/E ratio indicate?

A low P/E ratio can suggest that a stock is undervalued, or that the market has low expectations for future earnings growth. However, it could also reflect underlying problems with the company.

What are the limitations of using the P/E ratio?

The P/E ratio does not provide a complete picture of a company's financial health. It should be used in conjunction with other financial metrics and qualitative factors. Also, negative earnings result in an undefined P/E ratio, making comparisons impossible.

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Stock Expert AI provides data and analysis tools for educational purposes. This is not financial advice. Past performance does not guarantee future results. Always consult a qualified financial advisor before making investment decisions. Os números vêm da Financial Modeling Prep (FMP). Se a FMP não tiver um número para um ticker, um preço ou dado fundamental pode vir do Yahoo Finance como alternativa, ou um preço da Alpaca como alternativa. A SEC EDGAR é usada apenas para links de arquivamentos e dados de identificação da empresa (razão social, endereço), nunca para números.