computer-assisted trading

Deutsche Bank AG, ranked as the world's largest foreign-exchange institution in terms of global market share in Euromoney's 2011 annual survey, launched a new package of algorithms used to execute trades this month, and Goldman Sachs Group Inc. says it will deploy new computer-assisted trading technology this summer.

A more bewildering development is the array of complex, computer-assisted trading techniques that, in taking the stock exchanges by storm, have become a major cause of the market's extraordinary peaks and valleys.