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At the center of everything we do is a strong commitment to independent research and sharing its profitable discoveries with investors. This dedication to giving investors a trading advantage led to the creation of our proven Zacks Rank stock-rating system. Since 1988 it has more than doubled the S&P 500 with an average gain of +23.75% per year. These returns cover a period from January 1, 1988 through July 7, 2025. Zacks Rank stock-rating system returns are computed monthly based on the beginning of the month and end of the month Zacks Rank stock prices plus any dividends received during that particular month. A simple, equally-weighted average return of all Zacks Rank stocks is calculated to determine the monthly return. The monthly returns are then compounded to arrive at the annual return. Only Zacks Rank stocks included in Zacks hypothetical portfolios at the beginning of each month are included in the return calculations. Zacks Ranks stocks can, and often do, change throughout the month. Certain Zacks Rank stocks for which no month-end price was available, pricing information was not collected, or for certain other reasons have been excluded from these return calculations. Zacks may license the Zacks Mutual Fund rating provided herein to third parties, including but not limited to the issuer.
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Zacks News
The Zacks Analyst Blog Highlights: Zoom Video, Quidel, Zscaler, Datadog and Novavax
by Zacks Equity Research
The Zacks Analyst Blog Highlights: Zoom Video, Quidel, Zscaler, Datadog and Novavax
5 Must-Buy Stocks No Matter What Shape Recovery Takes
by Aniruddha Ganguly
Here we discuss five stocks that have gained more than 25% year to date and are well-poised to grow further, irrespective of the shape the economy takes to recover from COVID-19-induced recession.
5 Top-Ranked Stocks That Made Nasdaq Outperform in 1H
by Sweta Killa
The tech-heavy Nasdaq Composite Index has outperformed so far this year, having gained 12% in comparison to losses of 3.5%for the S&P 500 and 8.8% for Dow Jones.
5 Nasdaq Stocks That Have Returned More Than 100% YTD
by Aniruddha Ganguly
Here we discuss five Nasdaq-listed stocks that have gained more than 100% year to date and are well-poised to grow further on solid prospects.
3 Reasons Why Quidel (QDEL) Is a Great Growth Stock
by Zacks Equity Research
Quidel (QDEL) possesses solid growth attributes, which could help it handily outperform the market.
Will Quidel Continue to Surge Higher?
by Zacks Equity Research
As of late, it has definitely been a great time to be an investor of Quidel
The Zacks Analyst Blog Highlights: Tesla, Quidel, Datadog, Beyond Meat and DocuSign
by Zacks Equity Research
The Zacks Analyst Blog Highlights: Tesla, Quidel, Datadog, Beyond Meat and DocuSign
Is Quidel (QDEL) Outperforming Other Medical Stocks This Year?
by Zacks Equity Research
Is (QDEL) Outperforming Other Medical Stocks This Year?
5 High-Flying Stocks of Last Week That Defied Market Turmoil
by Nalak Das
Not all stocks succumbed to last week's market rout that ended the more than 10-week long rally. A few stocks popped last week.
Diagnostic Testing Remains Crucial in Combatting Coronavirus
by Trina Mukherjee
Let's keep a watch on three stocks that are focused on offering advanced diagnostic testing to fight against coronavirus.
Varex (VREX) Surges: Stock Moves 6.2% Higher
by Zacks Equity Research
Varex (VREX) saw a big move last session, as its shares jumped more than 6% on the day, amid huge volumes.
Nasdaq's Rally Continues Unabated: 5 Hot Picks
by Aniruddha Ganguly
Here we pick five stocks that trade on Nasdaq and are positioned to grow as the index's rally continues in June.
Quidel (QDEL) is an Incredible Growth Stock: 3 Reasons Why
by Zacks Equity Research
Quidel (QDEL) is well positioned to outperform the market, as it exhibits above-average growth in financials.
The Zacks Analyst Blog Highlights: Chegg, Bandwidth, Wayfair, Quidel and Atlas Air Worldwide
by Zacks Equity Research
The Zacks Analyst Blog Highlights: Chegg, Bandwidth, Wayfair, Quidel and Atlas Air Worldwide
Has Quidel (QDEL) Outpaced Other Medical Stocks This Year?
by Zacks Equity Research
Is (QDEL) Outperforming Other Medical Stocks This Year?
The Zacks Analyst Blog Highlights: Chegg, BJ's Wholesale Club, Atlas Air Worldwide, Sprouts Farmers Market and Quidel
by Zacks Equity Research
The Zacks Analyst Blog Highlights: Chegg, BJ's Wholesale Club, Atlas Air Worldwide, Sprouts Farmers Market and Quidel
Quidel (QDEL): Strong Industry, Solid Earnings Estimate Revisions
by Zacks Equity Research
Quidel (QDEL) has seen solid earnings estimate revision activity over the past month, and belongs to a strong industry as well.
5 Top Momentum Stocks for June as U.S. Economy Reopens
by Nalak Das
Market's momentum is likely to continue in the coming months as the global economy will gather pace after nearly three months of lockdowns.
Major Indexes Regain Crucial Milestones: 5 Top Growth Picks
by Nalak Das
The coronavirus-induced concerns are persisting and a vaccine is yet to be developed. Despite this, Wall Street bulls are raging forward.
Zacks.com featured highlights include: Eli Lilly and Company, Quidel, Everbridge and Sprouts Farmers Market
by Zacks Equity Research
Zacks.com featured highlights include: Eli Lilly and Company, Quidel, Everbridge and Sprouts Farmers Market
Top 4 Momentum Anomaly Stocks to Enhance Portfolio Returns
by Zacks Equity Research
These fast movers are currently witnessing a short-term pullback in price. So, this could be a solid entry point for garnering better returns.
The Zacks Analyst Blog Highlights: Chegg, Quidel, MarketAxess, Dropbox and Vertex Pharmaceuticals
by Zacks Equity Research
The Zacks Analyst Blog Highlights: Chegg, Quidel, MarketAxess, Dropbox and Vertex Pharmaceuticals
Can Quidel (QDEL) Run Higher on Strong Earnings Estimate Revisions?
by Zacks Equity Research
Quidel (QDEL) is seeing positive earnings estimate revisions, suggesting that it could be a solid choice for investors.
Major Indexes Defying "Sell in May" Adage: 5 Growth Picks
by Nalak Das
Half of this month is already over, yet Wall Street is in green defying the well-known financial-world adage "Sell in May and go away."
Quidel (QDEL) in Focus: Stock Moves 6.2% Higher
by Zacks Equity Research
Quidel (QDEL) saw a big move last session, as its shares jumped more than 6% on the day, amid huge volumes.