How to calculate the best performing stock in a historical data?

@aidan.jacobs 

To calculate the best performing stock in a historical data, you can follow these steps:

1. Collect the historical data for the stocks you are interested in analyzing. This data should include the opening and closing prices for each trading day over a specified period of time.
2. Calculate the daily returns for each stock by subtracting the opening price from the closing price and dividing the result by the opening price. This will give you the percentage change in price for each trading day.
3. Calculate the cumulative returns for each stock by multiplying together the daily returns for each trading day. This will give you the total percentage change in price over the entire period of time.
4. Identify the stock with the highest cumulative return as the best performing stock in the historical data.

Alternatively, you can also calculate the annualized return for each stock by dividing the cumulative return by the number of years in the historical data and then annualizing the result. This will give you a measure of the stock's performance on an annual basis, which can help you compare it to other stocks in the dataset.