Traders attributed the sharp move to the Fed's concern about potential deflation.
Russia's main stock exchange had a rare bounce on Monday, although traders attributed it more to a higher oil price.
An Enron spokesman said company traders attributed the drop to concerns about the S.E.C. investigation and the outcome of the merger talks with Dynegy.
Japanese stocks posted strong advances for the day, which traders attributed to lower interest rates in the United States and renewed hope for an uptick in technology sales.
Traders attributed part of the fall to slumping heating oil futures, which appeared capped by milder weather forecast in the Northeast early next week.
Oil traders attributed the weakness in the oil market to fears about a global economic slowdown that would reduce demand in the months ahead.
Traders attributed the setback to the sector's rally ahead of the economic report, when many investors speculated that the report would be stronger than expected.
Traders attributed the stock's fall to profit taking from speculative trading ahead of the earnings report and to muted disappointment that Amazon didn't meet Wall Street's "whisper number" for revenues of $300 million.
Though a recent global plunge in dollar prices was partially responsible for the strengthened rial, one currency trader attributed it to "the international situation and people's confidence in the government".
Moreover, some of the largest power traders still attribute an uncomfortably large percentage of net income to mark-to-market accounting.
