Short by going long???

I still need to read up on these, but there are inverse ETFs that match certain indexes. In other words, it's almost like going long an ETF that is shorting stocks. I'll check it out later.

If you want to bet against the...

QQQQ - buy UltraShort QQQQ ProShares (QID)
S&P 500 - SDS
MidCaps- MZZ