Here are three stocks with buy rank and strong momentum characteristics for investors to consider today, Dec. 16:Pan American Silver Corp. (PAAS) : This mining company has a Zacks Rank #1 and witnessed the Zacks Consensus Estimate for its current year earnings increasing 5.7% over the last 60 days.Pan American Silver’s shares gained 39.6% over the last three months compared with the S&P 500’s advance of 3.6%. The company possesses a Momentum Score  of A.Omnicell, Inc. (OMCL) : This company that provides aut ...