American Tower (AMT) boasts an extensive, geographically diversified communication real estate portfolio. The company will likely benefit from increased investment by wireless carriers in 4G and 5G networks. Solid business fundamentals and a prudent capital-allocation strategy augur well for growth.However, high customer concentration and the ongoing consolidation in the wireless industry are likely to weigh on its top-line growth.What’s Aiding AMT?The advancement in mobile technology, such as 4G and 5G, an ...