摘要: The ratio of the change in an option's price to the decrease in time to expiration. Since options are wasting assets, their value declines over time. As an option approaches its expiry date without b[阅读全文:]
摘要: The portion of the option premium that is attributable to the amount of time remaining until the expiration of the option contract.
Basically, time value is the value the option has in a[阅读全文:]
摘要: An option exchange rule that prevents the occurrence of a trade through.
If a better bid is posted on another exchange for an option and a market maker is unwilling or unable to match it[阅读全文:]
摘要: An option pricing model incorporating three possible values that an underlying asset can have in one time period. The three possible values the underlying asset can have in a time period may be greate[阅读全文:]
摘要: An event that occurs when the contracts for stock index futures, stock index options and stock options all expire on the same day. Triple witching days happen four times a year on the third Friday of [阅读全文:]
摘要: The rate at which the vomma of an option will react to volatility in the underlying market. It is the third order derivative of the option value with respect to volatility, or the derivative of vomma [阅读全文:]
A type of options contract that is not backed by an offsetting position that would help mitigate risk. “Trading naked”, as it is called, poses significant risks. However, an uncovered o[阅读全文:]
A term used in derivatives trading, such as with options. A derivative is a financial instrument whose price is based (derived) from a different asset. The underlying asset is the financial instrum[阅读全文:]
摘要: An investment strategy of short selling a security and entering a long position on its call.
This almost has the same effect as buying a put; the downside loss potential of the short pos[阅读全文:]