Do you mean like SH or PSQ? You still get decay from volatility on 1X inverse ETFs though, so be careful. Example: SH = 100 SPY = 100 S&P 500 up 20% SH = 80 SPY = 120 S&P 500 down 16.666% SH = 93.33 SPY = 100
If it's an ETF, you can search for it here: www.etfdb.com. As mentioned, even the 1x don't track perfectly over longer time frames. If it's something you plan on holding for awhile, you might be better off buying a straight DITM put or even a put spread.
Go to Proshares.com, and you can research the 1x, 2x, and even the 3x, but make sure you have the pepto on standby if you dive into the 3x!
I looked at the inverses. Always see the down direction easier than the up. So I tried one today. It's a choppy one. I'll report back when I see how it works out. Hope I don't end up with stomach problem from it