There's a study showing pension funds made most of their money on holdings held between one to four years. Funds that held less than one year lost money, day trading made 1%.
proof Not yet anyway. I'll let you know. How would you define consistent? For that matter, how would you define day trading?
Consistently profitable each quarter for a couple of years. I define day trading as having to stare at the screens each day, typically in and out of positions within the same day.