A new report finds high-frequency traders are profiting at the expense of the little guy.

It’s fast and furious, and highly controversial. High-frequency trading is the computer–based buying and selling of shares within fractions of a milli-second. A new study just out in Britain suggests this kind of trading is mostly beneficial.

Mid-day yesterday oil prices dropped three dollars in about a minute — and they have kept falling ever since.

The government has tightened security around release of labor department data on fears that high frequency traders may may access it illegally.

Three hearings in Washington today, all dealing with the idea of trust in the stock markets: Specifically, why ordinary U.S. investors don't have much right now.

Commentator Dave Lauer worked in high-frequency trading until he had a crisis of conscience.

High-speed computers dominate stock trading. But they cancel so many transactions that the SEC wants to fine them for “speeding.”

High-speed computer transactions are making the market more treacherous for smaller investors.

Experts advise U.S. securities regulators impose tougher rules on high-frequency trading to prevent a sequel to the May 6, 2010, "flash crash."