With Anthem agreeing to acquire Cigna for nearly $50 billion, we decided to check TheStreet Quant Ratings to see if there are any good stocks in the 'managed health care' sub-industry, worth buying. This merger will combine the second, and fifth largest companies, by revenue, in this sub-sector. The combined companies are projected to cover more than 53 million people, and have annual revenue of about $115 billion. Before this deal, TheStreet Quant Ratings rated Cigna an 'A ' buy. Here are some of the best managed health care stocks our algorithm says you should consider looking at. Number 3 is Aetna. With an 'A ' rating, the company's strengths can be seen in its revenue growth and increase in net income. 2nd is, Anthem. This rating is also an 'A+.' Anthem thrives in its solid stock price performance and revenue growth. Number 1 is UnitedHealth Group. This too has an 'A+' rating. The company flourishes in its solid stock price performance and notable return on equity. TheStreet Ratings are algorithmic stock picks based on 32 major data points. S&P 500 stocks rated 'buy' yielded a 16-and-a-half-percent return in 2014, beating the S&P 500 Total Return Index by more than 300 basis points. For the full reports on these stocks, you can check out TheStreet.com/QuantRatings.