Sorry green...I know nothing about index funds...
But I have heard they are about to change the rules for shorting so that you won't have to wait for an uptick to enter a short position...
I short one stock only--YHOO...been doing it for years, so I know it like the back of my hand...I shorted it today a few times since the open...it's like taking candy from a baby...
I just opened a new board on IHUB recently just for that purpose...It's called Daytrading Yahoo...Of course, I go long half of the time...I just go with the flow, and do fairly well...
If CPTCQ would quit dumping, I'd be doing better...but that's how he is without news...RBAK is helping to ease that pain today...
Good Luck To ALL ;^)