With this kind of analysis it is always wise to look at the distribution of returns instead of averages, since outliers can distort averages. Then also look if the trend (year wise) is constant. If that's the case it could mean something. (Just be careful to jump to conclusions)
If you go by that chart, then 11 out of 12 months, you buy at the open and close at the end... and you'll make money. I don't think it's that easy B1.
Exactly. If that weren't the case, one could just go all in every October and take the rest of the year off.
There's an old adage in Vegas... "If you have a system to beat the casino, they'll send a limo to pick you up." Card counters aside. And deriving market direction based off historic seasonality charts, is no where close to the microscopic edge that card counting gives a professional blackjack player. Soo... I'm not saying we're not going up, but I am saying that is useless "feel-good" information.
Looks like 2 month periods may be best. March-April, June-July, October-November. Or perhaps mid month to mid month 2 months hence. Such as mid March to mid May.