Shares of A123 Systems (AONE +29.3%) soar as AllianceBernstein discloses a 10.1% stake in the...

|About: A123 Systems, Inc. (AONEQ)|By:, SA News Editor

Shares of A123 Systems (AONE +29.3%) soar as AllianceBernstein discloses a 10.1% stake in the lithium ion battery maker via an amended 13G filing, up from a previously reported 6.4%. Shares had been cut in half after last month's battery recall and resulting analyst downgrades.