The Nasdaq-100 tracks the 100 largest non-financial companies on the Nasdaq Stock Market. On Nov. 18, mobile advertising company AppLovin (APP 1.25%) joined the index, replacing discount store Dollar Tree.AppLovin has been one of the fastest-growing stocks on the market. Its share price surged 2,140% during the last two years, more than doubling Nvidia's return during that period. Yet among the 29 analysts that follow the company, 79% still rate the stock a buy.Moreover, James Callahan at Piper Sandler rece ...