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.
A measure of risk based on the standard deviation of the asset return. Volatility is a variable that appears in option pricing formulas, where it denotes the volatility of the underlying asset return from now to the expiration of the option. There are volatility indexes.