1. I cannot get even a remote sense for the nature of his risk exposure from looking at his daily returns. 2. ok. 3. The point here is that a systematic bias in his algorithm will expose his trading strategy to the good graces of market fortune (luck) regardless of whether he trades a million, billion or once a day. The source of the bias is irrelevant. 4. did not see where he said that but that very much confirms 'timing' / which in this case I interpret as luck as being at least a contributing factor.