Maybe @ole_b_peters or @alex_adamou will care to explain what did they mean when they wrote that the S&P 500 suffers from survivorship bias.
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Try to infer what I think from what I say. Where do I discuss "forward expected returns"? The point is simple: if stocks must meet qualifying criteria to appear in an index, then the index differs systematically from one without those criteria.
You literally said “The index suffers from survivorship bias ... this acts in the opposite direction to the first caveat” which implies you think the index overstates the performance of a real investment (eg in an S&P 500 ETF). Just admit it’s a mistake and move on 
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I am still mystified about this mistake you would like me to admit. I asked for a factual correction and none was forthcoming. And, no, I did not claim the S&P500 overstates the performance of the S&P500. Ending this silliness now.
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Does it overstate something? If so, what does it overstate? You said it's a basket of winners (survivors) and none of us understands what that might mean. It's a basket of large cap stocks at any given time.
End of conversation
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