A downtrend has been apparent in BrightSphere Investment Group (BSIG) lately with too much selling pressure. The stock has declined 18.4% over the past four weeks. However, given the fact that it is now in oversold territory and Wall Street analysts are majorly in agreement about the company's ability to report better earnings than they predicted earlier, the stock could be due for a turnaround.Guide to Identifying Oversold StocksWe use Relative Strength Index (RSI), one of the most commonly used technical indicators, for spotting whether a stock is oversold. This is a momentum oscillator that measures the speed and change of price movements.RSI oscillates between zero and 100. Usually, a stock is considered oversold when its RSI reading falls below 30.Technically, every stock oscillates between being overbought and oversold irrespective of the quality of their fundamentals. And the beauty of RSI is that it helps you quickly and easily check if a stock's price is reaching a point of reversal.So, by this measure, if a stock has gotten too far below its fair value just because of unwarranted selling pressure, investors may start looking for entry opportunities in the stock for benefitting from the inevitable rebound.However, like every investing tool, RSI has its limitations, and should not be used alone for making an investment decision.Why BSIG Could Bounce Back Before LongThe RSI reading of 28.66 for BSIG is an indication that the heavy selling could be in the process of exhausting itself, so the stock could bounce back in a quest for reaching the old equilibrium of supply and demand.The RSI value is not the only factor that indicates a potential turnaround for the stock in the near term. On the fundamental side, there has been strong agreement among the sell-side analysts covering the stock in raising earnings estimates for the current year. Over the last 30 days, the consensus EPS estimate for BSIG has increased 4.5%. And an upward trend in earnings estimate revisions usually translates into price appreciation in the near term.Moreover, BSIG currently has a Zacks Rank #2 (Buy), which means it is in the top 20% of more than the 4,000 stocks that we rank based on trends in earnings estimate revisions and EPS surprises. This is a more conclusive indication of the stock's potential turnaround in the near term. You can see the complete list of today's Zacks Rank #1 (Strong Buy) stocks here >>>> Zacks Top 10 Stocks for 2022 In addition to the investment ideas discussed above, would you like to know about our 10 top picks for the entirety of 2022? From inception in 2012 through November, the Zacks Top 10 Stocks gained an impressive +962.5% versus the S&P 500’s +329.4%. Now our Director of Research is combing through 4,000 companies covered by the Zacks Rank to handpick the best 10 tickers to buy and hold. Don’t miss your chance to get in on these stocks when they’re released on January 3.Be First To New Top 10 Stocks >>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 BrightSphere Investment Group Inc. (BSIG): Free Stock Analysis Report To read this article on Zacks.com click here.