Variable Ratio Write - An option strategy in which the investor owns 100 shares of the underlying security and writes two call options against it, each option having a different striking price.

Vertical Spread - Any option spread strategy in which the options have different striking prices, but the same expiration dates.

VIX - An index measuring the level of implied volatility in US index options and is used as a measurement of volatility in the US stock market. Read More About VIX.

VIX Options - Non-equity options based on the CBOE VIX. Read More About VIX Options.

Volatile - A stock or market that is expected to move up or down unexpectedly or drastically is known as a volatile market or stock.

Volatile Strategy- An option strategy that is constructed to profit no matter if the underlying stock moves up or down quickly. Read All About Volatile Option Strategies.

Volatility - A measure of the amount by which an underlying security is expected to fluctuate in a given period of time. Generally measured by the annual standard deviation of the daily price changes in the security, volatility is not equal to the Beta of the stock. Read More About Volatiliy.

Volatility Skew - A graphical characteristic of the implied volatility of options of the same underlying asset across different strikes forming a right skewed curve. Read More About Volatiliy Skew.

Volatility Smile - A graphical characteristic of the implied volatility of options of the same underlying asset across different strikes forming the concave shape of a smile. Read More About Volatiliy Smile.

Volume - The number of transactions that took place in a trading day. Read More About Volume and Open Interest.