1 These cost between $35 and $55. 2  Keep in mind that an invisible fence doesn't keep other dogs, animals or people out of the yard. 3  The commercial site Dog-Fence-Guide.com provides an overview and links to reviews of various invisible fence products. If living in an area with frequent thunderstorms, consider buying a lightning protector. 2  These cost between $35 and $55. 3  Keep in mind that an invisible fence doesn't keep other dogs, animals or people out of the yard.
Understanding Implied Volatility. In simple terms, implied volatility is the amount of stock price fluctuations. Being on the right side of implied volatility changes can enhance the chances of success. In general, implied volatility increases when the market is bearish and decreases when the market is bullish. This is due to the common belief that bearish markets are more risky than bullish markets. Consider selling strategies when options are being traded at high implied volatility levels.
The volatility indices measure the implied volatility for a basket of put and call options related to a specific index or ETF. The most popular is the CBOE Volatility Index ($VIX), which measures the implied volatility for a basket of out-of-the-money put and call options for the S&P 500.n 2003 the CBOE adopted a new methodology that uses near-term and next-term put and call options to measure implied volatility for the S&P 500. As you can see from the charts above, the difference between these two indicators is negligible to the naked eye. Near-term options have at least 1 week left until expiration.