Shares of health-care giant Johnson & Johnson (NYSE:JNJ) have climbed more than 22% since the start of 2013. Part of this Dow component's success has been its growing pharmaceutical portfolio, which includes the recently approved type 2 diabetes drug Invokana. Shares of Merck (NYSE:MRK) have also jumped around 15% year to date, but the company hasn't had a drug with blockbuster potential approved by the FDA so far this year. There is a great deal of optimism, however, surrounding Merck's PD-1 drug for the treatment of melanoma. In the following video, health-care analyst Max Macaluso discusses this experimental drug and another PD-1 drug in development at Bristol-Myers Squibb (NYSE:BMY).

Max Macaluso, Ph.D. has no position in any stocks mentioned. The Motley Fool recommends and owns shares of Johnson & Johnson. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.