While I agree that the article is somewhat vague and imprecise, it is not accurate to encompass all statistical predictions as statarb either. That would more b

While I agree that the article is somewhat vague and imprecise, it is not accurate to encompass all statistical predictions as statarb either. That would more be what "quantitative" is. For a strategy to be considered statistical arbitrage, it needs to be something _against_ something else. You can do purely directional statistical predictions, and that would not be statarb.