Blackstone Secured Lending Fund (BXSL) could be a solid choice for investors given the company's remarkably improving earnings outlook. While the stock has been a strong performer lately, this trend might continue since analysts are still raising their earnings estimates for the company.Analysts' growing optimism on the earnings prospects of this company is driving estimates higher, which should get reflected in its stock price. After all, empirical research shows a strong correlation between trends in earnings estimate revisions and near-term stock price movements. Our stock rating tool -- the Zacks Rank -- has this insight at its core.The five-grade Zacks Rank system, which ranges from a Zacks Rank #1 (Strong Buy) to a Zacks Rank #5 (Strong Sell), has an impressive externally-audited track record of outperformance, with Zacks #1 Ranked stocks generating an average annual return of +25% since 2008.For Blackstone Secured Lending Fund, strong agreement among the covering analysts in revising earnings estimates upward has resulted in meaningful improvement in consensus estimates for the next quarter and full year.The chart below shows the evolution of forward 12-month Zacks Consensus EPS estimate:12 Month EPSCurrent-Quarter Estimate RevisionsThe company is expected to earn $0.88 per share for the current quarter, which represents a year-over-year change of +31.34%.Over the last 30 days, the Zacks Consensus Estimate for Blackstone Secured Lending Fund has increased 23.24% because three estimates have moved higher compared to no negative revisions.Current-Year Estimate RevisionsThe company is expected to earn $2.88 per share for the full year, which represents a change of +18.52% from the prior-year number.There has been an encouraging trend in estimate revisions for the current year as well. Over the past month, four estimates have moved up for Blackstone Secured Lending Fund versus no negative revisions. This has pushed the consensus estimate 10.57% higher.Favorable Zacks RankThanks to promising estimate revisions, Blackstone Secured Lending Fund currently carries a Zacks Rank #1 (Strong Buy). The Zacks Rank is a tried-and-tested rating tool that helps investors effectively harness the power of earnings estimate revisions and make the right investment decision. You can see the complete list of today's Zacks #1 Rank (Strong Buy) stocks here.Our research shows that stocks with Zacks Rank #1 (Strong Buy) and 2 (Buy) significantly outperform the S&P 500.Bottom LineBlackstone Secured Lending Fund shares have added 5.2% over the past four weeks, suggesting that investors are betting on its impressive estimate revisions. So, you may consider adding it to your portfolio right away to benefit from its earnings growth prospects. 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. It’s a little-known chemical company that’s up 65% over last year, yet still dirt cheap. With unrelenting demand, soaring 2022 earnings estimates, and $1.5 billion for repurchasing shares, retail investors could jump in at any time. 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 Blackstone Secured Lending Fund (BXSL): Free Stock Analysis ReportTo read this article on Zacks.com click here.Zacks Investment Research