Here are three stocks with buy rank and strong momentum characteristics for investors to consider today, June 20:SPAR Group, Inc. (SGRP) : This merchandising and brand marketing services provider has a Zacks Rank #1 and witnessed the Zacks Consensus Estimate for its current year earnings increasing 416.7% over the last 60 days.SPAR Group's shares gained 113.8% over the last three months compared with the S&P 500’s advanced of 5.1%. The company possesses a Momentum Score of B.Howmet Aerospace Inc. (HWM) : Th ...