Tyler Craig makes a good point about those selling newsletters (with a bullish or bearish bias):
It seems one could make the case for or against virtually any viewpoint or strategy depending on the objective. For example, if I sold a bearish newsletter I would no doubt discount any bullish news while trumpeting the slightest bearish developments with much fanfare. On the other hand, were I in the business of selling hope to the masses I would frequently gloss over any bearish developments while championing the bullish. Some cling to one idea or strategy and beat their proverbial drum day in and day out.
I think this is one of the main reasons that many pragmatists tend to gravitate to relative strength. Relative strength is just math and math doesn’t have an ax to grind.