The traders would buy or sell shares based on what they heard over the phone, a practice known as "front running."

The traders who buy the men do not buy women.

"Thus, traders could buy power at $250 and sell it for $1,200," according to one memo.

Traders often buy dollars as a secure investment during times of turmoil.

For example, suppose many traders are anticipating positive news and buy the stock.

As each report hit the market, traders either bought or sold, depending on the mood of the moment.

In market making, traders will buy and sell financial products with the goal of making money on each trade.

Seeing that, some traders bought the futures and then sold the stocks.

The dollar finished mostly higher as traders bought to cover short positions.

Also showing strength yesterday were the international oils, as traders bought quality issues.