Investment Glossary

Glossary of Investment Terms

Contract Size

Definition: Contract Size or “unit of trading,” is the amount of shares subject to being purchased or sold upon the exercise of a single option contract. The standard contract size for options on stocks is 100 shares. One call option contract gives its holder the right upon exercise to purchase 100 shares of the underlying stock.

Related Terms:

Back to glossary

Related Investment U Articles:




Check out our selection of daily Investment Research:



IU Blackboard IU Archives

What is Investment U?

Founded in 1999, Investment U publishes the free Investment U Daily newsletter, along with many other products designed to help investors make better decisions with their money.

Recent Articles


Investment U Weekly Update



Search Investment U:



What Readers Are Saying...

"I have to tell you - I REALLY DO like your articles - they are short, sweet and to the point with humor -how can you get any better than that??? you can't !!!"
Virginia L.

"I have been following your Investment U newsletter for several years and really appreciate the facts and info you provide."
Blaine K.

"Although my comments may be premature, I wish to thank you for the astonishing results that you have provided my bank account. I have been burned so many times by advisors that I qualify for the honorary title of investment guru. I am soon publishing a book…….Thank you for your efforts. Perhaps I have finally met an investment advisor with financial acumen coupled with caring attributes. Amazing!"
Evan L.

Questions? Comments? Feedback?