Research on 1,000 market winners shows explosive earnings—not cheap valuations—usually precede massive gains.
MARKET INSIDER – Many investors spend their time chasing headlines, predicting policy shifts, or hunting for stocks that appear cheap. Yet more than a century of market history suggests the biggest winners rarely begin with bargain prices. Instead, they typically start with something far more powerful: rapidly accelerating profits.
This insight comes from William J. O’Neil, the creator of the influential CAN SLIM system. After studying more than 1,000 of the best-performing stocks across 100 years of U.S. market history, O’Neil concluded that nearly every “super stock”—companies that eventually rise hundreds of percent—shares two defining traits: strong current earnings and sustained annual profit growth.
The first signal appears in the most recent quarterly results. In O’Neil’s framework, the “C” in CAN SLIM represents Current Quarterly Earnings, particularly rapid growth in earnings per share. His research suggested that the most promising stocks often report quarterly profit increases of at least 18% to 20%, with the biggest winners frequently delivering far stronger results—sometimes 40%, 100%, or even several hundred percent year over year. What matters most is acceleration. When earnings growth climbs from, for example, 25% to 45% and then to 80% over consecutive quarters, it often signals that a company is entering a powerful expansion phase that attracts institutional investors.
The second indicator lies in the “A” of CAN SLIM—Annual Earnings Growth. A single strong quarter is rarely enough to sustain a long-term rally. According to O’Neil’s analysis, the companies that deliver extraordinary stock performance typically show average annual profit growth of at least 25% over three years, accompanied by strong return on equity and improving profit margins. These signals suggest the business model itself is structurally strong rather than temporarily boosted by short-term factors.
The mechanism behind this pattern is straightforward. When companies report stronger-than-expected earnings, analysts raise forecasts, institutional investors begin accumulating shares, and capital flows accelerate into the stock. That inflow drives prices higher, which then attracts additional investors—creating a powerful momentum cycle that can propel a stock far beyond its initial breakout.
Elite trader Mark Minervini describes a related phenomenon known as the “Cockroach Effect.” In business, as in life, seeing one cockroach often means there are many more nearby. In markets, one outstanding earnings report often signals a broader wave of strong quarters ahead, fueled by new products, expanding markets, or favorable industry cycles.
This is why many investors fall into a common trap. They search for low valuations or depressed prices, assuming a rebound is inevitable. But markets rarely reward stagnation. Companies with declining earnings, flat revenues, and low price-to-earnings ratios often turn out to be value traps, where capital quietly exits rather than accumulates.
The deeper lesson is deceptively simple. Instead of asking which stock is cheapest, successful investors often ask which companies are growing the fastest—and whether that growth is accelerating. History shows that before a stock multiplies in value, it usually leaves clear evidence behind. Those clues rarely come from rumors or forecasts. They show up first in the numbers—in the profits themselves.
