EQUITIES

The extreme market volatility of recent days has shaken investors, who still are seeking a clear explanation of what sent U.S. stocks into Thursday's dizzying intraday spiral.

There is no evidence that last Thursday's mysterious U.S. stock market meltdown was caused by a cyberattack, a U.S. counterterrorism official said on Sunday.

U.S. securities regulators are considering new curbs to slow stock trades when markets are plunging following Thursday's dramatic sell-off, two people familiar with the matter said on Saturday.

President Barack Obama said on Friday that regulators would look for ways to prevent a repeat of Thursday's mysterious stock market meltdown, adding to expectations the U.S. government will make new regulations to curb runaway computer trading.

Shock waves from the stock market plunge rippled through Washington on Friday, prompting lawmakers to call for an amendment to a Wall Street reform bill that could lead to safeguards against technology glitches.

Stocks turned negative for the year on Friday on fears of another credit crisis stemming from Greece's souring finances and lingering questions about what triggered the previous session's dramatic plunge.

U.S. stocks fell on Friday as continued fears of a financial meltdown stemming from Greece's debt crisis and lingering questions about what triggered the previous session's dramatic plunge discouraged investors.

U.S. stocks fell on Friday on fears of a financial meltdown stemming from the debt crisis in Greece, but trading was extremely volatile in the aftermath of Thursday's dramatic plunge, keeping investors on edge.

President Barack Obama said U.S. authorities were investigating the cause of a nearly 1,000-point plunge in the Dow Jones industrial average that spooked investors and fueled anger at Wall Street.

U.S. stocks fell on Friday on fears of a financial meltdown stemming from the debt crisis in Greece, but trading was extremely volatile in the aftermath of Thursday's dramatic plunge, keeping investors on edge.

U.S. authorities on Friday were investigating the cause of a nearly 1,000-point plunge in the Dow Jones industrial average that left many investors gasping.

U.S. stocks fell on Friday as worry persisted about a financial meltdown stemming from the European debt crisis and after a dramatic intraday drop in indexes in the previous session.

The Securities and Exchange Commission held urgent discussions on Friday to calm investors' raw nerves a day after a plunge of nearly 1,000 points in the Dow Jones industrial average, during which some stocks lost more than 60 percent of their value.

U.S. stocks index futures rose in volatile trade on Friday, pointing to a higher open after a steep fall in the previous session, as data showed the economy added jobs at the fastest pace in four years.

U.S. stock index futures pared gains on Friday ahead of the U.S. government's April payrolls report, as nervous investors braced for volatility in the markets following Thursday's dramatic intraday bounce in shares.

U.S. stock index futures rose on Friday, with shares set to rebound after a steep fall in the previous session and ahead of a report expected to show the U.S. economy added more jobs last month.

Stock exchange operator Nasdaq OMX Group Inc issued the names of hundreds of stocks for which it is canceling trades following Thursday's sudden stock market plunge.

U.S. stock index futures rose on Friday, with shares set to rebound after a steep fall in the previous session and ahead of a report expected to show the U.S. economy added more jobs last month.

U.S. stock futures rose on Friday, as equities were set to rebound after a steep fall in the previous session and ahead of a key payrolls report.

U.S. stock futures pointed to a stronger start for Wall Street on Friday, with equities set to rebound after falling sharply in the previous session.

European stocks are primed for a pummeling on Friday, following ravaged U.S. and Asian shares, as Europe's debt crisis sent waves of dread through global markets and battered sterling and the euro.

Asian stocks were hammered on Friday as mounting fears over Europe's debt crisis sparked a global market rout that sent safe-haven assets soaring and clobbered sterling.

Stocks plunged 9 percent in the last two hours of trading on Thursday before clawing back some of the losses as a suspected trading glitch and fears of a new credit crunch in Europe threw markets into disarray.

A spine-chilling slide of nearly 1,000 points in the Dow Jones Industrial Average, its biggest intraday points drop ever, led to heightened calls for a crackdown on computer-driven high-frequency trading.

Initial public offerings around the world are being canceled as fear over Greece's deepening debt crisis and a sudden drop in U.S. stocks on Thursday rattled markets.

A spine-chilling slide of nearly 1,000 points in the Dow Jones Industrial Average, its biggest intraday points drop ever, led to heightened calls for a crackdown on computer-driven high-frequency trading.

The top communications regulator sought to calm fears his agency would heavily regulate Internet services, but shares in major cable companies fell and industry insiders predicted a prolonged legal battle.

U.S. communications regulators sought to calm fears they will heavily regulate Internet services, but shares in major U.S. cable companies fell and industry analysts predicted a prolonged legal battle.

U.S. stocks were down more than 3 percent on Thursday afternoon after briefly nosediving, with the Nasdaq at one point down more than 9 percent and the S&P 500 and Dow briefly falling into negative territory for the year, as worries about contagion from Greece's debt problems mounted.