Benzinga's Volume Movers

Vanguard Health Systems VHS surged 64.69% to $20.67. The volume of Vanguard Health shares traded was 24639% higher than normal. Tenet Healthcare THC announced its plans to acquire Vanguard Health for $4.3 billion including debt. Keynote Systems KEYN shares moved up 46.34% to $19.77. The volume of Keynote Systems shares traded was 5255% higher than normal. Keynote agreed to be acquired by Thoma Bravo for $20.00 per share. Isis Pharmaceuticals ISIS shares rose 17.66% to $25.87. The volume of Isis Pharmaceuticals shares traded was 453% higher than normal. Isis reported Phase 2 data on ISIS-APOCIII Rx. Tenet Healthcare THC shares climbed 6.88% to $44.30. The volume of Tenet Healthcare shares traded was 112% higher than normal. Tenet Healthcare announced its plans to acquire Vanguard Health for $4.3 billion including debt.