Zimmer Biomet's (ZBH) strategic efforts to drive growth in the Knee business are anchored by four meaningful pillars. The stabilization of the global musculoskeletal market is encouraging for future growth. By expanding its portfolio to include upper and lower joints, the company is enhancing its presence in emerging markets. Meanwhile, a debt-burdened balance sheet and adverse currency movements remain concerns for ZBH's operations. In the past year, this Zacks Rank #3 (Hold) stock has dropped 2.7% in valu ...