Benzinga's Volume Movers

shares rose 49.07 percent to $13.73. The volume of Affymetrix shares traded was 25217 percent higher than normal.

agreed to acquire Affymetrix for $1.3 billion in cash.

surged 1.73 percent to $76.97. The volume of Cooper-Standard Holdings shares traded was 278 percent higher than normal. Cooper-Standard Holdings shares have surged 34.51 percent over the past 52 weeks, while the S&P 500 index has declined 5.24 percent in the same period.

shares moved up 8.39 percent to $25.07. The volume of AMAG Pharmaceuticals traded was 159 percent higher than normal. AMAG Pharmaceuticals issued a strong FY15 revenue outlook.

shares climbed 3.05 percent to $49.34. The volume of Kohl's shares traded was 158 percent higher than normal. The Wall Street Journal reported Sunday that Kohl's could take itself private or consider a split-up.