According to the ETF Finder at ETF Channel, CNC makes up 2.42% of the SPDR S&PHealth Care Services ETF (XHS) which is up by about 0.7% on the day Friday.
In afternoon trading Friday, CNC was up about 0.3% on the day.
Aetna reported better-than-expected earnings Thursday, but its share price fell thanks to investor concerns over its participation in the Affordable Care Act.
Cramer is sticking with Kroger and says to sell WhiteWave.
Here, innovation trumps fears of the global economy and even fears of the Federal Reserve, Cramer says.