(NASDAQ:

) shares dropped 14.28 percent to $5.67 after rising 2.16 percent on Tuesday.

(NASDAQ:

) shares declined 12.24 percent to $2.94 after rising 5.02 percent on Tuesday.

(NYSE:

) shares fell 10.65 percent to $5.54. Seabridge Gold Drilling confirmed the major extension of KSM's Deep Kerr deposit.

(NYSE:

) shares declined 8.32 percent to $6.28. Bank of America downgraded Aerohive Networks from Buy to Underperform and lowered the price target from $9.00 to $7.00.

(NASDAQ:

) dropped 8.06 percent to $4.28. Century Aluminum issued a notice to employees at Hawesville, Kentucky smelter of its intent to curtail plant operations.

(NASDAQ:

) dipped 6.52 percent to $1.72 after the company reported the publication of results of Phase 2 study on hCDR1 (Edratide) in patients with active systemic lupus erythematosus in the Lupus Science & Medicine Journal.

(NYSE:

) fell 2.05 percent to $71.03 after the company announced its plans to acquire

(NYSE:

) for $66.36 per share.