
British scientific instruments maker Spectris SXS.L down 3.6% at 4015p
SXS said on Friday it had decided not to proceed with U.S. private equity firm Advent's buyout proposal
SXS's decision comes days after backing rival suitor KKR's KKR.N $6.4 bln offer
Stock up 66% YTD vs FTSE mid-caps' .FTMC 6.36% rise