New models have been developed to analyze changes in a company's value using stochastic discount rates. These models show that changes in a company's value growth are mainly influenced by fluctuations in discount rates, rather than changes in costs or cash flows. The models are based on stochastic discount rates and are different from traditional cash flow discounting models. They help assess factors affecting a company's value, evaluate investment value, and determine if a company's value is accurate. These models provide a new way to understand and manage a company's financial health.