Videos The Zacks Rank is comprised of four factors called Agreement, Magnitude, Upside and Surprise. Discover how these four factors can lead to dramatic stock gains. Articles You May Like Price to Sales Ratio ETFs vs. ETNs: Why You Need to Know the Difference 262 TIP. The REPO Markets with Luke Gromen 385 TIP. Breaking the Rules w/ David Gardner RWH002: Investing Wisely In An Uncertain World W/ Howard Marks