Sudden swings in HSBC and Diageo shares spark concern, raise questions about exchange stability in computer age.

U.S. equities are valued at 16 times earnings, 14 percent higher than a year ago. Bears see this as an sign the market is about to head downward.

U.S. equities are valued at 16 times earnings, 14 percent higher than a year ago. Bears see this as an sign the market is about to head downward.

European stocks cheaper than during last recovery, as profits rebound, but some analysts still see clouds on the horizon.

European stocks cheaper than during last recovery, as profits rebound, but some analysts still see clouds on the horizon.

Fed Bank of St. Louis president says Fed should continue buying bonds because growth is slower than expected.

Fed Bank of St. Louis president says Fed should continue buying bonds because growth is slower than expected.

Washington negotiations or lack thereof of primary cause.