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earnings growth

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Deep Dive: What Is the PEG Ratio

The price-to-earnings (P/E) ratio is the most widely cited valuation metric in investing — but used in isolation, it can be deeply misleading. A stock trading at 47 times earnings looks expensive next to one at 23 times earnings. But what if the first company is growing earnings at 57% annually while the second is growing at 15%? Suddenly the picture inverts. That is exactly the problem the PEG ratio solves. The PEG ratio — short for price/earnings-to-growth — adjusts the P/E ratio by the company's earnings growth rate, giving investors a single number that accounts for both what they are paying and what they are getting in return. Developed by investor Peter Lynch and popularized in his 1989 book *One Up on Wall Street*, the PEG ratio remains one of the most practical tools for comparing growth stocks on a level playing field. With the Federal Reserve cutting rates from 4.33% in August 2025 to 3.64% in January 2026, growth stocks have surged — and so have their P/E ratios. In this environment, PEG becomes especially valuable: it helps investors distinguish between stocks that are genuinely expensive and those that are simply priced for the growth they are delivering.

PEG ratioprice-earnings-to-growthstock valuation

Deep Dive: What Is Earnings Per Share (EPS)

Of all the metrics Wall Street obsesses over, none moves stock prices quite like earnings per share. When Apple reported $2.84 diluted EPS for its fiscal Q1 2026 — beating analyst estimates — the stock rallied. When a company misses its EPS target by even a penny, shares can plunge in after-hours trading. EPS is the single number that distills a company's entire profitability story into a figure every investor can compare. Earnings per share measures how much profit a company generates for each outstanding share of its common stock. It is the foundation of the price-to-earnings (P/E) ratio, the most widely used valuation metric in equity analysis. Understanding EPS — how it is calculated, what affects it, and where it can mislead — is essential for anyone evaluating stocks. Whether you are screening companies, reading an earnings report, or trying to understand why a stock just dropped 8% after hours, EPS is almost always at the center of the story. This guide breaks down the EPS formula, explains the critical difference between basic and diluted EPS, walks through real examples from Apple, Microsoft, and NVIDIA, and shows how investors use EPS alongside other metrics to make informed decisions.

earnings per shareEPSdiluted EPS