New York City ? Wall Street has turned the clock back to 1997.

Investors unable to extinguish their worries about a recession that has no end in sight dumped stocks again Monday. The Dow Jones industrial average tumbled 251 points to its lowest close since May 7, 1997, while the Standard & Poor’s 500 index logged its lowest finish since April 11, 1997. It’s as if the decade’s dot-com surge, collapse and subsequent recovery never occurred.

The Dow is just over 100 points from 7,000. Both indexes have lost about half their value since hitting record highs in October 2007.

Investors pounded most financial stocks even as government agencies led by the Treasury Department said they would launch a revamped bank rescue program this week. The plan includes the option of increasing government ownership in financial institutions without having to pour more taxpayer money into them.