| Term | Definition |
|---|---|
| Open interest |
The total number of option and future contracts that have not been exercised, closed out, or allowed to expire. |
| Open-end mutual fund |
A company’s total income before interests and taxes that earned from its operation. |
| Operating income |
An contract allowing the investor to buy or sell securities. |
| Options |
A situation in which the striking price is above the market price of the underlying stock for a call, or the striking price is below the market price of the underlying stock for a put. |
| Out-of-the-money |
A transaction made outside SEHK and HKFE. |
| Over-the-counter market |
The stated amount of a security. |
| Glossary |
| Tutorial |
| Psychology |