I last wrote about Qualys (NASDAQ: QLYS ) stock on September 17, giving it a Buy rating. Since then, it has gained over 23% due to a strong Q3 earnings report and news that the company is exploringI objectively search for undervalued stocks of any size across a wide variety of industries using quantitative methods that I've thoroughly backtested for success. I believe the numbers are more important than the story (most of the time), as they tend to paint a more realistic picture of the company’s prospects. ...