Cadence Design Systems (NASDAQ: CDNS) has been one of the most searched-for stocks on Zacks.com lately. So, you might want to look at some of the facts that could shape the stock's performance in the near term. Over the past month, shares of this maker of hardware and software products for validating chip designs have returned -2%, compared to the Zacks S&P 500 composite's +3.8% change. During this period, the Zacks Computer - Software industry, which Cadence falls in, has gained 1%. The key question now is: What could be the stock's future direction? Although media reports or rumors about a significant change in a company's business prospects usually cause its stock to trend and lead to an immediate price change, there are always certain fundamental factors that ultimately drive the buy-and-hold decision. Revisions to Earnings Estimates Rather than focusing on anything else, we at Zacks prioritize evaluating the change in a company's earnings projection. This is because we believe the fair value for its stock is determined by the present value of its future stream of earnings. Our analysis is essentially based on how sell-side analysts covering the stock are revising their earnings estimates to take the latest business trends into account. When earnings estimates for a company go up, the fair value for its stock goes up as well. And when a stock's fair value is higher than its current market price, investors tend to buy the stock, resulting in its price moving upward. Because of this, empirical studies indicate a strong correlation between trends in earnings estimate revisions ...