The article introduces a new type of model for predicting how stock prices change over time. This model is different from previous ones and can be used to test different ways of predicting stock price changes. By using a specific mathematical transformation, the model can make it easier to analyze stock market data. The researchers found that the traditional model for predicting stock prices works well for individual stocks but not for overall stock market trends. This means that different types of models may be needed to accurately predict how stock prices will change in the future.