"On the eve of earnings season, the bulls ended their long battle for Dow 11000 on Monday as the blue chips broke that psychological barrier amid high hopes for robust earnings and new details of a possible rescue for debt-ridden Greece."
Note, this is "psychological" based on "high hopes" and "possible rescue," neither of which is tangible. Think about it, our stock market is tied to debt in Greece (Isolationists take note.), and regulated by emotion. "Confidence" makes the numbers go up, while "fear" makes the numbers go down (as is guns & ammo). They don't have to even be based on real numbers - just "hope" in "possibilities."
So everyone just "hope" that things will "change" and it'll all be better!