Wells Fargo analyst David Maris says he does not know what products, if any, are manufactured at Mylan's India-based plant that received the warning letter from the FDA. As such, the letter may have little or no immediate commercial risk, Maris tells investors in an intraday research note. The analyst questions whether the FDA will stop letting drugs from this facility into the U.S. He adds that to him, "nothing is more critical for a brand or generic drug company than being able to ensure that its products are safe and effective." Maris keeps a Market Perform rating on Mylan.