WorldCom shares opened at 7 cents in pre-open U.S. trade, having changed hands at 83 cents when they traded last on June 25. Trading resumed after federal securities regulators said they had received a sworn statement from WorldCom officials detailing the company's financial condition.

The shares fell to 6 cents before moving back to the level of 7 cents, after WorldCom, in a sworn statement to the Securities and Exchange Commission, said its audit committee is reviewing its financial records for 1999 through 2001, adding questions have been raised about "certain material reversals of reserve accounts during 2000 and 1999."

Trading in shares of its consumer long-distance telephone service unit, MCI Group MCITE.O , will remain halted until additional information is provided about the status of MCI's dividend payment. MCI shares closed at $1.68 on June 25.