Has AmerisourceBergen (ABC) Outpaced Other Medical Stocks This Year? Posted byZacks Equity Research December 16, 2021 Leave a comment on Has AmerisourceBergen (ABC) Outpaced Other Medical Stocks This Year? Here is how AmerisourceBergen (ABC) and Amphastar Pharmaceuticals (AMPH) have performed compared to their sector so far this year.