- theta
- The Greek letter used in the financial industry to represent the amount by which the price of an option changes for each one-day decrease in the time remaining until its expiration. American Banker Glossary————The ratio of the change in an option price to the decrease in time to expiration . Also called time decay. Bloomberg Financial Dictionary————The measure of the change in an option's premium given a change in the option's time until expiration. Equal to the change in the option's premium divided by the change in time to expiration. Chicago Mercantile Exchange Glossary————The measure of the change in an option's premium given a change in the option's time until expiration. Equal to the change in the option's premium divided by the change in time to expiration. Exchange Handbook Glossary————The measure of change in the value of an option relative to the continuous decrease in time to expiry. LIFFE————The sensitivity of a warrant's value to the passage of time. Theta, (% week) shows the theoretical fall in warrant price in 7 days with all other factors remaining the same. NYSE Euronext Glossary
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A measure of change in the value of an option compared with the continuous decrease in time to expiry. Also known as time decay.► See also Option.
Financial and business terms. 2012.