Thursday's market movers

Genentech, Dow, Geron among the most actively traded stocks Thursday.

NEW YORK ( -- The following stocks were among the most actively traded on Thursday:

Genentech (down $2.38 to $80.31, Charts) reported results that beat forecasts.

Dow Chemical (up $1.10 to $46.19, Charts) said it had fired an executive and a board member who had spoken to a third party about a potential acquisition of the firm.

Geron (down $0.19 to $7.37, Charts) The Senate voted to remove a ban on federal funding for embryonic stem cell research but not by a wide enough margin to overcome an expected presidential veto.

Novastar Financial (up $0.36 to $5.39, Charts), a subprime lender, said it is exploring strategic alternatives, including a possible sale of the company.

Research in Motion (down $10.96 to $135.06, Charts), the BlackBerry maker, reported a sharply higher fourth-quarter profit Wednesday, but also revealed the Securities and Exchange Commission has upgraded its informal probe into its stock options practice into a formal investigation.

Sprint Nextel (up $0.52 to $19.70, Charts) surfaced in a Wall Street Journal report that said activist shareholder Ralph Whitworth has built a nearly 1 percent stake in the wireless telecom company and is using his position to call for changes, including a pullback in its capital spending and a potential sale of its fiber-optic networking and long-distance operation.

Vonage (up $0.31 to $3.31, Charts), the internet phone company, saw its CEO Michael Snyder step down amid setbacks related to Verizon's patent suit against the company.


Nasdaq leads comeback attempt

Vonage CEO Michael Snyder steps down Top of page