Investors interested in Medical stocks should always be looking to find the best-performing companies in the group. Has Ambrx Biopharma Inc. (AMAM) been one of those stocks this year? Let's take a closer look at the stock's year-to-date performance to find out.Ambrx Biopharma Inc. is one of 1069 individual stocks in the Medical sector. Collectively, these companies sit at #4 in the Zacks Sector Rank. The Zacks Sector Rank considers 16 different sector groups. The average Zacks Rank of the individual stocks ...