That's generally true, however the yields generally come from short-term rallies that don't correct themselves. So if someone misses such an event it can be a r

That's generally true, however the yields generally come from short-term rallies that don't correct themselves. So if someone misses such an event it can be a really long time to recover from it. I think I could possibly show you a 20 year period in the past 100 years of US stock market without significant gains.