UltraShort S&P 500 (NYSE: SDS) is closed at $112.94 Wednesday. SDS seeks daily investment results that correspond to twice the inverse daily performance of the S&P 500. SDS December option implied volatility of 140 is above its 26-week average of 58 according to Track Data, suggesting larger price movement.

UltraShort QQQ ProShares (NYSE: QID) closed at $89.25 Wednesday. QID seeks daily investment results that correspond to twice the inverse daily performance of the NASDAQ Index-100 Index. QID December option implied volatility of 139 is above its 26-week average of 75 according to Track Data, suggesting larger price movement.

UltraShort Financials ProShares (NYSE: SKF) is recently is recently up $1.67 to $224.50. SKF is an exchange traded fund seeking daily investment results that correspond to twice (200%) the inverse (opposite) of the daily performance of the Dow Jones U.S. Financials Index. SKF December option implied volatility of 185 is above its 26-week average of 95 according to Track Data, suggesting larger price movement.

Option Update is provided by Stock Specialist Paul Foster of theflyonthewall.com

UltraShort S&P500 ProShares (AMEX: SDS) seeks daily investment results that correspond to twice the inverse daily performance of the S&P 500. SDS July option implied volatility of 42 is near its 26-week average according to Track Data, suggesting non-directional price movement.

UltraShort QQQ ProShares (AMEX: QID) seeks daily investment results that correspond to twice the inverse daily performance of the NASDAQ Index-100 Index. QID July option implied volatility of 51 is near its 26-week average of 51 according to Track Data, suggesting non-directional price movement.

Option Update is provided by Stock Specialist Paul Foster of theflyonthewall.com

If you've ever delved into investing in ETFs (exchange-traded funds, basically entire indexes and sectors that trade like stocks), you're already familiar with the most popular, those being Powershares QQQ Trust (Nasdaq: QQQQ), SPDR Trust Series 1 (AMEX: SPY), Diamonds Trust, Series 1 (AMEX: DIA), iShares Russell 2000 Index (NYSE: IWM) and lately Financial Select SPDR (AMEX: XLF) and UltraShort QQQ ProShares (AMEX: QID). But have you ever looked into those that are much less followed, but more capable of yielding some big-time returns?

I primarily trade fun smallcap stocks, so until the past few days, I hadn't either. But when I began researching, I just kept finding more and more interesting ETFs -- it was addictive! Almost addictive as my new Twitter account where I've discovered I can chat with business legends, yesterday it was the founder of eBay Inc (Nasdaq: EBAY). Okay, maybe ETFs will never be that addictive!

Out the few hundred ETFs I looked into, here were some of the more interesting of the bunch:

For those who wish to hedge a portfolio against downside risk, Nate Pile suggests a pair of ETFs that benefit from a market decline. Here is the latest from his Nate's Notes.

"Although I would argue that much of the potential bad news has already been factored into stock prices, one of the mantras I have come to respect over the years is 'don't find the trend'... and the trend is currently down.

"Thus, I believe it would be foolish to not take at least a few cautionary steps with regards to protecting our portfolios until it becomes more clear just how bad things are going to get.

"As a result, I am recommending two 'short fund' ETFs as short-term investments -- ProShares UltraShort Dow 30 (AMEX: DXD) and the ProShares UltraShort QQQ (AMEX: QID). Both are designed to provide results, before fees and expenses, which correspond to the inverse of the performance of their respective indexes.