Piper Jaffray analyst Christopher Raymond says he remains a buyer of Regeneron Pharmaceuticals (REGN) ahead of the Dupixent asthma October 20 FDA action date. With consensus expecting this indication to contribute well over $1B in revenue in coming years, approval is a "critical near-term catalyst" for the shares, Raymond tells investors in a research note. The analyst adds that while some investors have expressed angst over the breadth of the label, namely restricting use to eosinophilic asthma, he believes recent Sanofi (SNY) commentary provides reason for optimism. The totality of clinical data and the biology behind Dupixent supports a broad label, Raymond contends. He maintains an Overweight rating on Regeneron with a $450 price target.

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