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Efficient Filtering of Securities in the Research Environment

Ok, so my goal is to get the ebitda every day for the last three years for the stocks AAPL and MSFT. What I'm doing now is definitely too computationally expensive seeing as it won't stop trying to execute for about 10 minutes until I manually interrupt it.

I wouldn't expect it to be so hard to gather EBITDA and Shares out standing for two securities for roughly 1500 days? Please review my code and tell me what your thoughts are.