| held | A situation where a security is temporarily not available for trading. Market Makers are not allowed to display quotes of held securities. | |
| house | A person or company doing business as a broker or dealer in securities, investment banking, or related services. | |
| house spread | Among Market Maker firms, the house spread is the difference between the highest price bid for a security, and the highest price asked the difference between best bid and best ask. (See best ask, best bid, inside market, inside quote) | |
| hypothecation | Pledging of securities or other assets as collateral to secure a loan, such as a debit balance in a margin account. (See debit balance, margin) |
