Update (9:35 a.m.): Updated with Tuesday market open information.
The stock was up 2.72% to $44.61 at 9:34 a.m. on Tuesday.
Cepheid's (CPHD) stock rating was cut to 'neutral' at Baird on Monday morning.
Barclays hiked Cepheid's (CPHD) stock price target to $52 on Wednesday after Danaher (DHR) agreed to buy the company for $4 billion yesterday.
Potential targets of the medical device and diagnostics giant might request stricter parameters when structuring a deal, company followers say.
Mergers and high-growth stocks are making the market better and better, Cramer says.