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Trailing P/E

Trailing P/E

Divides the current share price by the last twelve months of actual earnings, exposing what investors currently pay per dollar of demonstrated profit.

Trailing P/E compares the current share price to the company's earnings per share over the last year. Higher P/E often reflects higher growth expectations, while lower P/E can signal lower expectations or potential undervaluation.

The trailing price-to-earnings ratio (trailing P/E) measures how much investors pay for each unit of a company's historical earnings. Calculated using actual reported earnings from the past four quarters, it provides a concrete, fact-based valuation metric that does not rely on projections or estimates. This makes it the most commonly cited P/E ratio in financial media and stock screeners.

The formula uses trailing twelve months (TTM) earnings:

Trailing P/E = Current Share Price / Earnings Per Share (TTM)

For example, if a stock trades at $50 and earned $2.50 per share over the past year, its trailing P/E is 20. This means investors pay $20 for every $1 of historical earnings.

Interpreting P/E levels requires context:

  • High P/E (25+): Investors expect strong future growth, or the stock may be overvalued
  • Market average (15-25): Typical valuation range for established companies
  • Low P/E (<15): May indicate undervaluation, slow growth expectations, or business concerns
  • Negative P/E: Company has negative earnings; P/E not meaningful

P/E varies significantly by sector:

  • Technology: Often 25-40+ due to growth expectations
  • Utilities: Typically 12-18 for stable, slow-growth businesses
  • Banks: Usually 8-15 reflecting cyclical earnings
  • Consumer staples: Moderate 15-22 for defensive, steady earners

Always compare a stock's P/E to its sector peers and its own historical range. A P/E of 30 is high for a bank but low for a fast-growing tech company.

Important limitations:

  • Backward-looking: Past earnings may not represent future profitability
  • Earnings quality: Accounting choices can inflate or depress reported earnings
  • One-time items: Unusual gains or charges distort the trailing figure
  • Cyclical businesses: P/E appears lowest at cycle peaks when earnings are highest, often a poor time to buy

For more predictive analysis, compare trailing P/E to forward P/E, which uses analyst estimates for future earnings.

How it relates

Market CapitalizationMarket capitalization is the total value of all a company's shares at the current share price. It's a quick way to see how big the company is in the stock market.÷Net IncomeNet income is the final profit after subtracting all expenses, interest and taxes. It is the bottom line of the income statement and represents the earnings available to shareholders.=Trailing P/E
Trailing P/E÷Quarterly Earnings Growth (YoY)Quarterly earnings growth year-over-year shows how much profit has changed compared to the same quarter last year. Positive values mean earnings are growing; negative values mean they are shrinking.=PEG RatioThe PEG ratio compares the P/E ratio to the company's expected growth rate. Values around 1 are often seen as 'fair', while much higher values can mean the stock is expensive relative to its growth.

Where it fits

Net IncomeNet income is the final profit after subtracting all expenses, interest and taxes. It is the bottom line of the income statement and represents the earnings available to shareholders.→Trailing P/E→PEG RatioThe PEG ratio compares the P/E ratio to the company's expected growth rate. Values around 1 are often seen as 'fair', while much higher values can mean the stock is expensive relative to its growth.
Trailing P/E→Valuation