At the tail end of Q1 earnings, the performance of investment managers (part of the broader Finance sector) over the last couple of years seems to have been reversed with most of the companies lagging estimates on lower revenues. Moreover, the strengthening of the U.S. dollar impacted the global diversified assets under management (AUM) mix.Though a rebound in March was witnessed from the widespread sell-off in January and February, it was not enough to sustain the uptrend in the investment management space. Investors have been fretting over the slowdown in China, weakness in the energy markets, uncertainty over interest rate hike and several other macro headwinds.Despite the introduction of new products, the industry as a whole has been witnessing net outflows. As a result, AUM for many investment managers declined in the three months ended Mar 31, 2016.Some investment managers, including Lazard Ltd. LAZ, Invesco Ltd. IVZ, Franklin Resources, Inc. BEN, Janus Capital Group, Inc. JNS, The Blackstone Group L.P. BX and BlackRock, Inc. BLK have released their results which have missed estimates. Moreover, Apollo Global Management, LLC APO and Fortress Investment Group LLC FIG slipped to loss in the quarter.Let’s take a look at the 3 investment management stocks that are scheduled to release their results on May 10.Ares Management, L.P. ARES is slated to report first-quarter 2016 results before the opening bell. The Zacks Consensus Estimate for the company has been on a downtrend over the last 30 days. Additionally, the estimate of 24 cents per share for the upcoming release indicates a year-over-year decline of about 30.48%.Further, the company has a Zacks Rank #5 (Strong Sell) with an Earnings ESP of -12.50%, showing that the company is less likely to beat the Zacks Consensus Estimate in the quarter.Note that we caution against stocks with a Zacks Rank #4 or 5 (Sell-rated) going into the earnings announcement, especially when the company is seeing negative estimate revisions.Ares Management depicts a disappointing surprise history as indicated by the chart below: Northstar Asset Management Group Inc. NSAM is scheduled to announce results before the opening bell. The company has a Zacks Rank #4 (Sell) with an Earnings ESP of 0.00%, making it difficult to conclusively predict an earnings beat for the first quarter.The Zacks Consensus Estimate for Northstar Asset Management has remained stable over the last 30 days. Yet, the estimate of 29 cents for the upcoming release indicates a year-over-year rise of about 45.0%.Notably, the earnings surprise history for the company lacks sheen. Prospect Capital Corporation PSEC, with a Zacks Rank #3 (Hold) and an Earnings ESP of 0.00%, is also less likely to beat the Zacks Consensus Estimate in the fiscal third-quarter (ended Mar 31). Though Zacks Rank #3 increases the predictive power of earnings beat, we also need a positive Earnings ESP for an earnings beat.The Zacks Consensus Estimate for Prospect Capital Corporation remained stable over the last 30 days. Further, the estimate of 25 cents for the upcoming release reflects a year-over-year increase of about 5.83%.Moreover, Prospect Capital Corporation shows a decent earnings surprise history as indicated in the chart below: WWant 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 >>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 JANUS CAP GRP (JNS): Free Stock Analysis Report INVESCO LTD (IVZ): Free Stock Analysis Report BLACKSTONE GRP (BX): Free Stock Analysis Report FRANKLIN RESOUR (BEN): Free Stock Analysis Report BLACKROCK INC (BLK): Free Stock Analysis Report FORTRESS INVEST (FIG): Free Stock Analysis Report LAZARD LTD (LAZ): Free Stock Analysis Report ARES MANAGEMENT (ARES): Free Stock Analysis Report NORTHSTAR ASSET (NSAM): Free Stock Analysis Report PROSPECT CAP CP (PSEC): Free Stock Analysis Report APOLLO GLOBAL-A (APO): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research