mdancho84/quantitative_stock_analysis_tutorial ? reverse-engineered prompt

Build me an R script that analyzes S and P 500 stocks the way a quick quantitative stock screening tutorial would.

I want it to pull together a list of S and P 500 companies, get their price history, compute stock returns, and then calculate correlations so I can see which stocks move together. Please make it easy to run from one file, with clear steps and comments so I can follow along even if I am not deeply technical.

It would be great if the script also shows a simple example of sorting or screening the results, so I can quickly spot interesting stocks based on return performance and correlation. Keep it practical and focused on analysis, not a big app. If you need current package or data source details, look up the latest docs online and use whatever is most reliable.