Despite the ongoing concerns, major European indexes snapped back after big losses Tuesday.
On Tuesday, the Dow average saw another in a long line of one-day V-shaped recoveries.
European stock markets fell again and the American stock market opened lower over European worries on Monday.
The stock market rebounded somewhat Friday morning after news that the German parliament approved that country's portion of a large European bailout.
The Dow Jones Industrial Average dropped below the 10,000 mark Friday morning amid worries about the Europe debt crisis, following big losses on Thursday.
Wall Street investor sentiment over European debt problems and an unexpected spike in unemployment claims drove the market downward.
A report on the May 6 stock market 'flash crash' released by regulators Tuesday is thin on answers for why the Dow took a 1,000-point dive.
The Labor Department said Thursday that initial claims for unemployment benefits dropped last week by 4,000, the fourth weekly decline in a row.
Regulators tell Congress they're moving to erect new stock market 'circuit breakers' to pause trading when individual stocks fall quickly.