Here are three stocks with buy rank and strong momentum characteristics for investors to consider today, August 12th:Unum Group UNM: This financial protection benefit solutions company specializing in debts and loans has a Zacks Rank #1 and witnessed the Zacks Consensus Estimate for its current year earnings increasing 8.1% over the last 60 days.Unum Group Price and Consensus Unum Group price-consensus-chart | Unum Group QuoteUnum’s shares gained 10.5% over the last three months compared with the S&P 500’s advance of 4.5%. The company possesses a Momentum Score of B.Unum Group Price Unum Group price | Unum Group QuoteKnowBe4, Inc. KNBE: This company that engages in the development, marketing, and sale of its Software-as-a-Service-based security awareness platform has a Zacks Rank #1 and witnessed the Zacks Consensus Estimate for its current year earnings increasing 14.3% over the last 60 days.KnowBe4, Inc. Price and Consensus KnowBe4, Inc. price-consensus-chart | KnowBe4, Inc. QuoteKnowBe4’s shares gained 17.3% over the last three months compared with the S&P 500’s advance of 4.5%. The company possesses a Momentum Score of B.KnowBe4, Inc. Price KnowBe4, Inc. price | KnowBe4, Inc. QuoteNOV Inc. NOV: This company that sells systems, components, and products for oil and gas drilling and production, and industrial and renewable energy sectors has a Zacks Rank #1 and witnessed the Zacks Consensus Estimate for its current year earnings increasing 112.5% over the last 60 days.NOV Inc. Price and Consensus NOV Inc. price-consensus-chart | NOV Inc. QuoteNOV’s shares gained 10.3% over the last six months compared with the S&P 500’s decline of 5.2%. The company possesses a Momentum Score of A.NOV Inc. Price NOV Inc. price | NOV Inc. Quote See the full list of top ranked stocks here Learn more about the Momentum score and how it is calculated here. Zacks Names "Single Best Pick to Double" From thousands of stocks, 5 Zacks experts each have chosen their favorite to skyrocket +100% or more in months to come. From those 5, Director of Research Sheraz Mian hand-picks one to have the most explosive upside of all. It’s a little-known chemical company that’s up 65% over last year, yet still dirt cheap. With unrelenting demand, soaring 2022 earnings estimates, and $1.5 billion for repurchasing shares, retail investors could jump in at any time. This company could rival or surpass other recent Zacks’ Stocks Set to Double like Boston Beer Company which shot up +143.0% in little more than 9 months and NVIDIA which boomed +175.9% in one year.Free: See Our Top Stock and 4 Runners Up >>Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report NOV Inc. (NOV): Free Stock Analysis Report Unum Group (UNM): Free Stock Analysis Report KnowBe4, Inc. (KNBE): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research