Basically, sell-side analysts who cover stocks pay attention to how earnings forecasts are being revised to reflect the impact of the latest business trends. If a company's profit forecast rises, so does the fair value of its stock. If the fair value is higher than the current market price, investors will be interested in buying shares, and the stock price will rise. This is the reason empirical research shows that there is a strong correlation between revised earnings forecasts and short-term stock price fluctuations.