Crescent Capital BDC (CCAP) could be a solid addition to your portfolio given a notable revision in the company's earnings estimates. While the stock has been gaining lately, the trend might continue since its earnings outlook is still improving.The upward trend in estimate revisions for this company reflects growing optimism of analysts on its earnings prospects, 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.Consensus earnings estimates for the next quarter and full year have moved considerably higher for Crescent Capital BDC, as there has been strong agreement among the covering analysts in raising estimates.Current-Quarter Estimate RevisionsFor the current quarter, the company is expected to earn $0.44 per share, which is a change of -8.33% from the year-ago reported number.Over the last 30 days, two estimates have moved higher for Crescent Capital BDC compared to no negative revisions. As a result, the Zacks Consensus Estimate has increased 5.22%.Current-Year Estimate RevisionsFor the full year, the earnings estimate of $1.75 per share represents a change of +4.79% from the year-ago number.In terms of estimate revisions, the trend for the current year also appears quite encouraging for Crescent Capital BDC. Over the past month, three estimates have moved higher compared to no negative revisions, helping the consensus estimate increase 5.01%.Favorable Zacks RankThanks to promising estimate revisions, Crescent Capital BDC currently carries a Zacks Rank #2 (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 LineWhile strong estimate revisions for Crescent Capital BDC have attracted decent investments and pushed the stock 11% higher over the past four weeks, further upside may still be left in the stock. So, you may consider adding it to your portfolio right away.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 Crescent Capital BDC, Inc. (CCAP): Free Stock Analysis Report To read this article on Zacks.com click here.