Time Series

A time series is a sequence of data points, typically taken at regular intervals. Time series are often used to track the performance of a particular investment or security, or to forecast future values.

There are two main types of time series:

* **Univariate time series:** A univariate time series is a time series that contains only one variable. For example, a stock price time series would be a univariate time series.
* **Multivariate time series:** A multivariate time series is a time series that contains more than one variable. For example, a stock price and volume time series would be a multivariate time series.

Time series analysis is the process of analyzing time series data in order to extract useful information. There are a number of different techniques that can be used for time series analysis, including:

* **Simple moving averages:** A simple moving average is a type of moving average that is calculated by taking the average of a fixed number of data points.
* **Exponential moving averages:** An exponential moving average is a type of moving average that is calculated by giving more weight to more recent data points.
* **ARIMA models:** An ARIMA model is a type of autoregressive integrated moving average model that can be used to forecast future values of a time series.

Time series analysis is a powerful tool that can be used to gain valuable insights into a variety of financial data. By using time series analysis, investors can make more informed decisions about their investments.