Block Trade Definition - The 50K Trade (and others)
"A large amount of securities being traded, typically at least 10,000 shares of stock or $200,000 in bonds. Normally, only 'institutional investors' undertake such large trades."
'institutional investor' Definition
An "Entity with large amounts to invest, such as investment companies, mutual funds, brokerages, insurance companies, pension funds, investment banks and endowment funds."
uBuy until uSell - uWink, uWait, uWin! - Netman