Buying $1000 In REGN: If an investor had bought $1000 of REGN stock 20 years ago, it would be worth $57,109.53 today based on a price of $563.10 for REGN at the time of writing.

Regeneron presents an interesting investment case. Its valuation doesn't fully capture Dupixent's strength or its pipeline potential. Bears worry about Eylea's patent cliff, but this seems priced in.