Here are three stocks with buy ranks and strong growth characteristics for investors to consider today December 19th:Twilio (TWLO) : This company which enables developers to build, scale and operate real-time communications within software applications, carries a Zacks Rank #1 (Strong Buy), and has witnessed the Zacks Consensus Estimate for its current year earnings increasing 6.7% over the last 60 days.Twilio has a PEG ratio of 0.69 compared with 1.84 for the industry. The company possesses a Growth Score ...