Here are four stocks with buy rank and strong value characteristics for investors to consider today, October 8th:Insight Enterprises, Inc. (NSIT): This technology company has a Zacks Rank #1 (Strong Buy), and seen the Zacks Consensus Estimate for its current year earnings rising 5.6% over the last 60 days.Insight Enterprises, Inc. Price and Consensus Insight Enterprises, Inc. price-consensus-chart | Insight Enterprises, Inc. QuoteInsight Enterprises has a price-to-earnings ratio (P/E) of 11.17, compared with 11.40 for the industry. The company possesses a Value Score of A.Insight Enterprises, Inc. PE Ratio (TTM) Insight Enterprises, Inc. pe-ratio-ttm | Insight Enterprises, Inc. QuoteOffice Properties Income Trust (OPI): This real estate investment trust company has a Zacks Rank #1, and seen the Zacks Consensus Estimate for its current year earnings rising 5.8% over the last 60 days.Government Properties Income Trust Price and Consensus Government Properties Income Trust price-consensus-chart | Government Properties Income Trust QuoteOffice Properties Income Trust has a price-to-earnings ratio (P/E) of 5.14, compared with 22.70 for the industry. The company possesses a Value Score of B.Government Properties Income Trust PE Ratio (TTM) Government Properties Income Trust pe-ratio-ttm | Government Properties Income Trust QuoteMcKesson Corporation (MCK): This healthcare company has a Zacks Rank #2 (Buy), and seen the Zacks Consensus Estimate for its current year earnings rising 0.3% over the last 60 days.McKesson Corporation Price and Consensus McKesson Corporation price-consensus-chart | McKesson Corporation QuoteMcKesson has a price-to-earnings ratio (P/E) of 9.08, compared with 17.90 for the industry. The company possesses a Value Score of A.McKesson Corporation PE Ratio (TTM) McKesson Corporation pe-ratio-ttm | McKesson Corporation QuoteGran Tierra Energy Inc. (GTE): This energy company has a Zacks Rank #2, and seen the Zacks Consensus Estimate for its current year earnings rising 55.6% over the last 60 days.Gran Tierra Energy Inc. Price and Consensus Gran Tierra Energy Inc. price-consensus-chart | Gran Tierra Energy Inc. QuoteGran Tierra Energy has a price-to-earnings ratio (P/E) of 8.07 compared with 10.40 for the industry. The company possesses a Value Score of A.Gran Tierra Energy Inc. PE Ratio (TTM) Gran Tierra Energy Inc. pe-ratio-ttm | Gran Tierra Energy Inc. QuoteSee the full list of top ranked stocks here.Learn more about the Value score and how it is calculated here.Wall Street’s Next AmazonZacks EVP Kevin Matras believes this familiar stock has only just begun its climb to become one of the greatest investments of all time. It’s a once-in-a-generation opportunity to invest in pure genius.Click for details >>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 Government Properties Income Trust (OPI): Free Stock Analysis Report Insight Enterprises, Inc. (NSIT): Free Stock Analysis Report McKesson Corporation (MCK): Free Stock Analysis Report Gran Tierra Energy Inc. (GTE): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research