Dark Pools

[quote]Dark pools of liquidity are financial trading venues or crossing networks similar to exchanges but that provide liquidity that is not displayed on order books. This is useful for traders who wish to move large numbers of shares without revealing themselves to the open market. […]
Broker-dealer-owned dark pools: Barclays, Citi, Credit Suisse, Goldman Sachs, Deutsche Bank, Merrill Lynch, Morgan Stanley, UBS, Bloomberg, …[/quote]


[url=http://en.wikipedia.org/wiki/Dark_pools_of_liquidity]Wikipedia[/url]