who has a better perforance record? (month to month) I think in the next few years Shorts will keep winning....
I dont think either side has an "advantage". You play both sides depending on your analysis and make money by both shorting and being long in this market
I don't think there was every a prolonged period (>12 months) in the last 10 years where dedicated short sellers were able to beat flexible bias L/S funds.