the word on the street is the fed will buy any supply and put a support in the market. there is no free market anymore especially in the market index and commodity markets.. it's rigged to the upside or manipulated that is the goal of the fed..
if your not betting on earnings, some report or news that affects stock volatility, then yea shorting is really hard. imo shorting is also hard intraday because selling weakness isn't working as well as buying weakness. which seems flawed because trend following should win the coinflip more often. But if you're trying to short around 11est stocks that are up on the day (like mcp, mon, wlt) then don't expect much--you're going against the trend in a strong bull market and sector.