Bernstein says to 'take a breather' on Regeneron as competition heats up

View of Corporate and Research and Development Headquarters of Regeneron Pharmaceuticals on Old Saw Mill River Road in Tarrytown, New York.
Lev Radin | LightRocket | Getty Images

Bernstein said it is "time to take a breather" on shares of Regeneron as the pharmaceutical company's major drugs face increasing competition.

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