Signet (SIG) jumps up 5% in premarket trading after the firm is named to the S&P MidCap 400...

|About: Signet Jewelers Limited (SIG)|By:, SA News Editor

Signet (SIG) jumps up 5% in premarket trading after the firm is named to the S&P MidCap 400 index to replace recently acquired Varian Semiconductor (VSEA). The switch will be effective on Nov. 10.