Overview
Earnings Per Share (EPS) is one of the most fundamental metrics in equity analysis, representing the portion of a company's net profit allocated to each outstanding share of common stock. Formula: (Net Income โ Preferred Dividends) รท Weighted Average Shares Outstanding.
Types of EPS
- Basic EPS: Uses the actual number of shares outstanding
- Diluted EPS: Accounts for potential dilution from stock options, convertible bonds, warrants, and restricted stock units (RSUs). Always lower than or equal to basic EPS. SEC requires both be reported
- Adjusted/Non-GAAP EPS: Excludes one-time items (restructuring charges, asset write-downs). Companies and analysts often prefer this to see 'core' profitability, but critics note it can be selectively flattering
Why EPS Matters
- Earnings season driver: Quarterly EPS beats/misses move stock prices significantly. A company beating consensus by >5% typically sees a 2โ3% positive price reaction on average
- P/E calculation: PER = Stock Price รท EPS. Without EPS there is no P/E ratio
- Dividend coverage: EPS must exceed dividends per share for sustainability. Payout ratio = Dividends รท EPS
EPS Growth & Market Impact
- S&P 500 aggregate EPS: grew from ~$30 (2000) to ~$220 (2024), reflecting corporate profit growth plus share buybacks
- Share buybacks boost EPS by reducing the denominator. S&P 500 companies spent ~$800 billion on buybacks in 2023 alone (S&P Global)
- Apple example: EPS grew from $2.10 (FY2015) to $6.42 (FY2023) โ partly from 40%+ share count reduction through buybacks
Limitations
- EPS can be boosted by buybacks without genuine profit growth โ always check absolute net income alongside
- Accounting manipulation: revenue recognition timing, depreciation changes, and one-time gains can inflate EPS
- Not comparable across industries without context โ capital-intensive industries have structurally different EPS profiles
- Does not reflect cash flow quality โ a company can report positive EPS while burning cash (accrual vs. cash accounting)