Here are four stocks with buy rank and strong momentum characteristics for investors to consider today, September 20th:Iridium Communications Inc. IRDM: This provider of mobile voice and data communications services and product has a Zacks Rank #1 (Strong Buy) and witnessed the Zacks Consensus Estimate for its current year earnings increasing 52.4% over the last 60 days. Iridium Communications Inc Price and Consensus Iridium Communications Inc price-consensus-chart | Iridium Communications Inc Quote Iridium Communications’ shares gained nearly 9% over the last one month against the S&P 500’s decline of nearly 1%. The company possesses a Momentum Score of A. Iridium Communications Inc Price Iridium Communications Inc price | Iridium Communications Inc Quote Aluminum Corporation of China Limited ACH: This manufacturer and seller of alumina, primary aluminum, and energy products has a Zacks Rank #1 and witnessed the Zacks Consensus Estimate for its current year earnings increasing 16.2% over the last 60 days. Aluminum Corporation of China Limited Price and Consensus Aluminum Corporation of China Limited price-consensus-chart | Aluminum Corporation of China Limited Quote Aluminum Corporation of China’s shares gained 42.8% over the last one month. The company possesses a Momentum Score of A. Aluminum Corporation of China Limited Price Aluminum Corporation of China Limited price | Aluminum Corporation of China Limited Quote Goodrich Petroleum Corporation GDP: This independent oil and natural gas company has a Zacks Rank #1 and witnessed the Zacks Consensus Estimate for its current year earnings increasing nearly 30% over the last 60 days. Goodrich Petroleum Corporation Price and Consensus Goodrich Petroleum Corporation price-consensus-chart | Goodrich Petroleum Corporation Quote Goodrich Petroleum’s shares gained 37% over the last one month. The company possesses a Momentum Score of A. Goodrich Petroleum Corporation Price Goodrich Petroleum Corporation price | Goodrich Petroleum Corporation Quote Extraction Oil & Gas, Inc. XOG: This independent oil and gas company has a Zacks Rank #1 and witnessed the Zacks Consensus Estimate for its current year earnings increasing 46.7% over the last 60 days. Extraction Oil & Gas, Inc. Price and Consensus Extraction Oil & Gas, Inc. price-consensus-chart | Extraction Oil & Gas, Inc. Quote Extraction Oil & Gas’ shares gained 23.5% over the last one month. The company possesses a Momentum Score of A. Extraction Oil & Gas, Inc. Price Extraction Oil & Gas, Inc. price | Extraction Oil & Gas, Inc. Quote See the full list of top ranked stocks hereLearn more about the Momentum score and how it is calculated here. Breakout Biotech Stocks with Triple-Digit Profit Potential The biotech sector is projected to surge beyond $2.4 trillion by 2028 as scientists develop treatments for thousands of diseases. They’re also finding ways to edit the human genome to literally erase our vulnerability to these diseases. Zacks has just released Century of Biology: 7 Biotech Stocks to Buy Right Now to help investors profit from 7 stocks poised for outperformance. Recommendations from previous editions of this report have produced gains of +205%, +258% and +477%. The stocks in this report could perform even better.See these 7 breakthrough stocks now>>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 Aluminum Corporation of China Limited (ACH): Free Stock Analysis Report Iridium Communications Inc (IRDM): Free Stock Analysis Report Goodrich Petroleum Corporation (GDP): Free Stock Analysis Report Extraction Oil & Gas, Inc. (XOG): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research