Whether you're a growth, value, income, or momentum-focused investor, building a successful investment portfolio takes skill, research, and a little bit of luck.
How do you find the right combination of stocks that will generate returns that could fund your retirement, or your kids' college tuition, or your short- and long-term savings goals?
Enter the Zacks Rank.
What is the Zacks Rank?
The Zacks Rank is a unique, proprietary stock-rating model that utilizes earnings estimate revisions to help investors build a winning portfolio.
There are four main factors behind the Zacks Rank: Agreement, Magnitude, Upside, and Surprise.
Agreement is the extent to which all brokerage analysts are revising their earnings estimates in the same direction. The greater the percentage of analysts revising their estimates higher, the better chance the stock will outperform.
Magnitude is the size of the recent change in the consensus estimate for the current and next fiscal years.
Upside is the difference between the most accurate estimate, which is calculated by Zacks, and the consensus estimate.
Surprise is made up of a company's last few quarters' earnings per share surprises; companies with a positive earnings surprise are more likely to beat expectations in the future.
Each one of these factors is given a raw score that's recalculated every night, and then compiled into the Zacks Rank. Using this data, stocks are classified into five groups, ranging from "Strong Buy" to "Strong Sell."
The Power of Institutional Investors
The Zacks Rank also allows individual investors, or retail investors, to benefit from the power of institutional investors.
Institutional investors are responsible for managing the trillions of dollars invested in mutual funds, hedge funds, and investment banks. Research has shown that these investors can and do move the market due to the large amount of money they deal with, and thus, the market tends to move in the same direction as them.
In order to figure out the fair value of a company and its shares, these investors will build valuation models focused on earnings and earnings expectations. Because if you raise estimates for the bottom line, it creates a higher fair value for a company.
Institutional investors will use these changes to help in their decision-making, typically buying stocks with rising estimates and selling those with falling estimates. Higher earnings expectations can translate into a rise in stock price and bigger gains for the investor.
Because it can take a long time for an institutional investor to build a position--sometimes weeks, if not months--retail investors who get in at the first sign of upward revisions have a distinct advantage over these larger investors, and can benefit from the expected institutional buying that will follow.
Not only can the Zacks Rank help you take advantage of trends in earnings estimate revisions, but it can also provide a way to get into stocks that are highly sought after by professionals.
How to Invest with the Zacks Rank
The Zacks Rank is known for transforming investment portfolios. In fact, a portfolio of Zacks Rank #1 (Strong Buy) stocks has beaten the market in 26 of the last 32 years, with an average annual return of +23.8%.
Moreover, stocks with a new #1 (Strong Buy) ranking have some of the biggest profit potential, while those that fell to a #4 (Sell) or #5 (Strong Sell) have some of the worst.
Let's take a look at Fortinet (FTNT), which was added to the Zacks Rank #1 list on August 5, 2026. Headquartered in Sunnyvale, CA, Fortinet, Inc. is a leader in cybersecurity, driving the convergence of networking and security. It provides integrated security solutions to enterprises, service providers and government entities across 100 countries.
14 analysts revised their earnings estimate higher in the last 60 days for fiscal 2026, while the Zacks Consensus Estimate has increased $0.27 to $3.42 per share. FTNT also boasts an average earnings surprise of 20.3%.
Analysts are expecting earnings to grow 23.9% for the current fiscal year, with revenue forecasted to rise 19.4%.
Additionally, FTNT has climbed higher over the past four weeks, gaining 9.2%. The S&P 500 is down 2% in comparison.
Bottom Line
With a #1 (Strong Buy) ranking, positive trend in earnings estimate revisions, and strong market momentum, Fortinet should be on investors' shortlist.
If you want even more information on the Zacks Ranks, or one of our many other investing strategies, check out the Zacks Education home page.
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Fortinet, Inc. (FTNT): Free Stock Analysis ReportThis article originally published on Zacks Investment Research (zacks.com).
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