The Trump administration says reporters' use of computers in secure lockup rooms can give high-speed traders a "head start" on market-moving news.
The combination of two high-frequency traders comes as low volatility has been squeezing the profits that firms make from rapid-fire trades.
High-frequency trading might reduce liquidity, not boost it as its defenders claim.
Basic errors in software testing and deployment may be responsible for wild swings in the stock markets, according to the SEC.
Basic errors in software testing and deployment, maybe as much as newfangled algorithms, have caused the trading malfunctions in the stock markets, says Mary Schapiro.
Equity markets are more volatile than ever, and many observers say high-frequency trading is the reason.
