The survivorship bias described by wikipedia is complete nonsense. Events that wipe out stock markets also wipe out bond markets and often wipe out banks. Usually when people talk about survivorship bias in this context, they mean that the people compiling the data are complete incompetents who only look at currently existing stocks.
If your interest is in the absolute return and not in the premium, then survivorship is a bias.
ETA: I think I was too harsh on the people that look at the wrong stocks. But too soft on wikipedia.
The survivorship bias described by wikipedia is complete nonsense. Events that wipe out stock markets also wipe out bond markets and often wipe out banks. Usually when people talk about survivorship bias in this context, they mean that the people compiling the data are complete incompetents who only look at currently existing stocks.
If your interest is in the absolute return and not in the premium, then survivorship is a bias.
ETA: I think I was too harsh on the people that look at the wrong stocks. But too soft on wikipedia.