Offset

To offset a position is to neutralize or close out an open position.

One touch option

A one touch is an option with an American barrier.

One touch with knock out option

The one touch with knock out option is a one touch option with a knock out barrier added.

One-sided accrual option

In a one sided accrual, a fixed payout is made for every fixing date that the spot rate is above or below a predefined rate.

Option

An option is a contract that conveys to its owner the right but not the obligation to buy or sell the underlying...

OTC

OTC (over-the-counter) is the term used to describe any transaction that is not conducted over an exchange.

OTC spread option

An OTC spread option is similar to the crack option.

OTC spread swap

An OTC spread swap (also known as a differential swap) is similar to a basis swap, i.e., it is a cash settled swap where the fixing basis for the swap's underlying is the price differential (i.e., the spread) between two predefined commodities.

OTC spread swap strip

An OTC spread swap strip (also known as a differential swap strip) is simply a strip of OTC spread swaps.

OTM

An option is said to be OTM (out-the-money) when the current underlying (such as the spot or the index) is below the strike price for a call option and above the strike price for a put option.

Out strike

The barrier at which an option will knock out.

Outright forward

See Forward contract.

Overnight indexed swap

The overnight indexed swap (OIS) is an interest rate swap where the OIS floating leg is set by reference to a daily overnight reference rate, rather than by reference to a short-term published reference rate.