So I want to do some simple side by side annual comparisons of individual ET/Fund performance and it seems like every source I look at has different calculations for "Total Return". Example: I was looking up YTD Total Return for PGX... Bloomberg says 1.01%, Schwab says 1.22%, and Yahoo says -1.9%. I like how Yahoo provides a year by year historical return, which is what I am ideally looking for, but can I trust the numbers? Is there a reliable source out there to extract this info? You would think it would be a simple math equation which would produce consistent numbers, but apparently not.