Looking for a stock that has been consistently beating earnings estimates and might be well positioned to keep the streak alive in its next quarterly report? Aflac (AFL), which belongs to the Zacks Insurance - Accident and Health industry, could be a great candidate to consider.When looking at the last two reports, this insurer has recorded a strong streak of surpassing earnings estimates. The company has topped estimates by 21.44%, on average, in the last two quarters.For the last reported quarter, Aflac came out with earnings of $1.53 per share versus the Zacks Consensus Estimate of $1.30 per share, representing a surprise of 17.69%. For the previous quarter, the company was expected to post earnings of $1.27 per share and it actually produced earnings of $1.59 per share, delivering a surprise of 25.20%.Price and EPS SurpriseWith this earnings history in mind, recent estimates have been moving higher for Aflac. In fact, the Zacks Earnings ESP (Expected Surprise Prediction) for the company is positive, which is a great sign of an earnings beat, especially when you combine this metric with its nice Zacks Rank.Our research shows that stocks with the combination of a positive Earnings ESP and a Zacks Rank #3 (Hold) or better produce a positive surprise nearly 70% of the time. In other words, if you have 10 stocks with this combination, the number of stocks that beat the consensus estimate could be as high as seven.The Zacks Earnings ESP compares the Most Accurate Estimate to the Zacks Consensus Estimate for the quarter; the Most Accurate Estimate is a version of the Zacks Consensus whose definition is related to change. The idea here is that analysts revising their estimates right before an earnings release have the latest information, which could potentially be more accurate than what they and others contributing to the consensus had predicted earlier.Aflac currently has an Earnings ESP of +4.74%, which suggests that analysts have recently become bullish on the company's earnings prospects. This positive Earnings ESP when combined with the stock's Zacks Rank #2 (Buy) indicates that another beat is possibly around the corner. We expect the company's next earnings report to be released on February 2, 2022.With the Earnings ESP metric, it's important to note that a negative value reduces its predictive power; however, a negative Earnings ESP does not indicate an earnings miss.Many companies end up beating the consensus EPS estimate, though this is not the only reason why their shares gain. Additionally, some stocks may remain stable even if they end up missing the consensus estimate.Because of this, it's really important to check a company's Earnings ESP ahead of its quarterly release to increase the odds of success. Make sure to utilize our Earnings ESP Filter to uncover the best stocks to buy or sell before they've reported. Zacks Names "Single Best Pick to Double" From thousands of stocks, 5 Zacks experts each have chosen their favorite to skyrocket +100% or more in months to come. From those 5, Director of Research Sheraz Mian hand-picks one to have the most explosive upside of all. As one investor put it, “curing and preventing hundreds of diseases…what should that market be worth?” This company could rival or surpass other recent Zacks’ Stocks Set to Double like Boston Beer Company which shot up +143.0% in little more than 9 months and NVIDIA which boomed +175.9% in one year.Free: See Our Top Stock and 4 Runners Up >>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 Aflac Incorporated (AFL): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research