The Jefferies Biotechnology team sees "attractive buying opportunities" amidst the pre-election weakness. While volatility will likely continue into the election, valuation multiples are near-historic lows and policy concerns, while valid, are likely overstated, the analysts tell investors in a research note. They recommend using the weakness to buy select names ahead of a potential improvement in sentiment. Jefferies likes Gilead (GILD) and Celgene (CELG) among large-caps, The Medicines Co. (MDCO), Alkermes (ALKS) and Vertex (VRTX) among mid-caps, and Alder Biopharmaceuticals (ALDR), Cempra (CEMP), Ultragenyx (RARE) and Immunomedics (IMMU) among small-caps.