Autocorrelation diagnostic routines are essential tools in analyzing financial data. They provide a numerical and graphical representation of test statistics, which help us identify any correlations between the data points. This allows us to understand the patterns and trends in the data, which is crucial in making financial decisions. By utilizing these routines, we can gain valuable insights into the behavior of financial variables and make informed decisions based on solid evidence. So, it's important to familiarize ourselves with these diagnostic routines and their results to become successful in the world of finance.