Healthcare stocks were flat to lower premarket Thursday, with the State Street Health Care Select Sector SPDR ETF (XLV) retreating by 0.3% and the iShares Biotechnology ETF (IBB) flat.
Bio-Techne (TECH) stock rose more than 19% premarket after the company signed a definitive agreement to be acquired by Germany's Merck KGaA for $73 a share, representing an enterprise value of $11.3 billion.