Biotech's $20 billion Merger Monday sparks hope for more deals By: CNBC.com News January 22, 2018 at 12:48 PM EST Three weeks into 2018, deal activity in the biotech sector is already almost halfway to what it was in 2017, at least in terms of size. Read More >> Related Stocks: Biogen Idec Clovis Oncology Inc Sanofi-Aventis S.A. ADR