One of the reasons why it's always going up is because they KEEP PRINTING MONEY.
The stocks are valued against the DOLLAR. As money perpetually loses it's value, stocks naturally go up.
'Black swan' events, which happen every so often usually wipe out all these "up only" strategies. So it might work for 10 years, but then you lose it all in a single event.
The environment keeps changing. You need to accustom the strategy depending on the environment. Nothing works all the time.
The stocks are valued against the DOLLAR. As money perpetually loses it's value, stocks naturally go up.
'Black swan' events, which happen every so often usually wipe out all these "up only" strategies. So it might work for 10 years, but then you lose it all in a single event.
The environment keeps changing. You need to accustom the strategy depending on the environment. Nothing works all the time.