Off-board - This term may refer to transactions over-the-counter in unlisted securities or to transactions of listed shares that are not executed on a national securities exchange.

Offer - The price at which a person is ready to sell. Opposed to bid, the price at which one is ready to buy.

Open order - Open orders commonly occur when investors place price restrictions on their buy and sell transactions. As market orders are filled instantaneously, investors who enter limit orders will typically have to wait before the price that they set as their limit is reached. These orders will remain open either for the duration determined by the customer or until they are filled.

Out-of-Pocket Maximum - The maximum amount of money you will be required to pay per year for your health insurance plan's deductibles and coinsurance. This maximum may apply to each family member, or to an entire family. The maximum amount is in addition to your premiums.

Overbought - An opinion as to price levels. May refer to a security that has had a sharp rise or to the market as a whole after a period of vigorous buying which, it may be argued, has left prices "too high."

Oversold - The reverse of overbought. A single security or a market which, it is believed, has declined to an unreasonable level.

Over-the-counter - A market for securities made up of securities dealers who may or may not be members of a securities exchange. The over-the-counter market is conducted over the telephone and deals mainly with stocks of companies without sufficient shares, stockholders or earnings to warrant listing on an exchange. Over-the-counter dealers may act either as principals or as brokers for customers. The over-the-counter market is the principal market for bonds of all types.