Outside reversal is a price pattern that shown a potential change in trend on the chart. 

Outside days are the days where the price for security is more volatile than in the previous session.

October effect is a market anomaly that stocks decline during October. 

Open-end fund is a diversified portfolio of pooled investors’ money that can issue an unlimited number of shares.

Original cost is the price associated with buying of an asset.

An open market is an economic system with no barriers for the free market activity.

An option premium is the income received by the investor who sells an option contract to another party.

An option pool is a term used to describe shares or stock reserved for employees of a privately traded company.

Overtraded – the situation when the pressure on the asset is growing due to the high numbers of traders buying and selling it. Usually results in the rapid fall of the asset.

An output gap indicates the difference between the existing output of a country and its maximum potential output. The gap can be both positive and negative.

Oscillator of a moving average is a technical indicator that indicates the difference between an oscillator and its moving average at any given period of time.

Out trade is a trade that can’t be placed because due to receiving conflicting information. The clearing house can’t settle the trade as data submitted by both parties of the transaction is either inconsistent or contradictory.

Options backdating is a practice of giving the option the price dated prior to the actual date of the issuance of the option. This way the price can be lower than the actual price of the option.

Optionable stock is a stock that has no listed and traded options in the market exchange. Not all of the companies which are traded publically issue options are it is always connected with meeting some of the requirements like a certain minimum of outstanding shares and others.

Outsourcing is the practice for the big and medium businesses to hire working power outside of the country of originating of the business, despite it still being registered there. It is usually done with the intentions to cut costs.

Outside broker can refer to several things:

1. Broker who deals outside of the major exchange and deals with major securities.

2. A broker who deals with securities which aren’t traded in the exchange where he works.

Overwriting is one of the most intricate transactions in the market as it involves selling or buying options which are thought to be overpriced and, as a result the transaction is not believed to be possible to exercise. The practice is used to collect premium securities.

Oil refinery is an oil working plant that turn crude oil into petroleum products, such as gasoline, diesel and heating oils. Refinery is a second stage of production, the first one being extraction of the oil crude from the field.

Off board trading is a type of trading that involves trading stocks which are not traded at the major exchanges. It can also be said about the stocks which are traded at the major stock exchanges, but the deal is still done over the counter. This type of trading can involve only the stocks, appeared on the exchange in 1979.

Overheated economy occurs in the countries that have been having extremely good economic performance which resulted in high levels of inflation and overproducing. High prices are also quite often the consequence of the overheated economy. It usually results in recession.