S&P 500 historical constituents change data from 2008 to 2014/2015

ozonosphere

Newbie
1 0
I am desperate to get some recent additions and deletions of S&P 500.

if the data comes with accurate announcement date and effective date, that would be awesome.

Do you guys know any good channel where I can acquire these information?

I have did some research, it seems the data I get comes without announcement date.

Since S&P 500 gives announcement date randomly between 1 - 5 days prior to effective date, is there a way to get the announcement date other than just assuming?
 
 
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