Add a new Column in Result Table with economic return

Hi, and welcome!

Please see the FAQ: What's a reproducible example (`reprex`) and how do I do one? Using a reprex, complete with representative data will attract quicker and more answers.

The code is not enough; the data is essential. Doesn't have to be the actual tickers you're using or more than just a few. Without the data the trade is a DK

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