Here are three stocks with buy ranks and strong growth characteristics for investors to consider today, August 20:Norwegian Cruise Line Holdings Ltd. (NCLH) : This cruise company carries a Zacks Rank #1, and has witnessed the Zacks Consensus Estimate for its current year earnings increasing 9.1% over the last 60 days.Norwegian Cruise Line has a PEG ratio of 0.20 compared with 1.86 for the industry. The company possesses a Growth Score of A.SharkNinja, Inc. (SN) : This product design and technology company c ...