Here are three stocks with buy rank and strong momentum characteristics for investors to consider today, September 30:Pampa Energía S.A. (PAM) : This integrated power company has a Zacks Rank #1 and witnessed the Zacks Consensus Estimate for its current year earnings increasing 8.7% over the last 60 days.Pampa Energía' shares gained 37.4% over the last three months compared with the S&P 500’s advanced of 4.7%. The company possesses a Momentum Score of A.Sterling Infrastructure, Inc. (STRL) : This infrastruc ...