Investors with an interest in Financial - Investment Management stocks have likely encountered both Franklin Resources (BEN) and Blackstone Group (BX). But which of these two stocks offers value investors a better bang for their buck right now? We'll need to take a closer look.Everyone has their own methods for finding great value opportunities, but our model includes pairing an impressive grade in the Value category of our Style Scores system with a strong Zacks Rank. The proven Zacks Rank puts an emphasis on earnings estimates and estimate revisions, while our Style Scores work to identify stocks with specific traits.Both Franklin Resources and Blackstone Group have a Zacks Rank of # 2 (Buy) right now. This system places an emphasis on companies that have seen positive earnings estimate revisions, so investors should feel comfortable knowing that these stocks have improving earnings outlooks. But this is only part of the picture for value investors.Value investors are also interested in a number of tried-and-true valuation metrics that help show when a company is undervalued at its current share price levels.The Value category of the Style Scores system identifies undervalued companies by looking at a number of key metrics. These include the long-favored P/E ratio, P/S ratio, earnings yield, cash flow per share, and a variety of other fundamentals that help us determine a company's fair value.BEN currently has a forward P/E ratio of 10.99, while BX has a forward P/E of 26.86. We also note that BEN has a PEG ratio of 0.75. This metric is used similarly to the famous P/E ratio, but the PEG ratio also takes into account the stock's expected earnings growth rate. BX currently has a PEG ratio of 1.31.Another notable valuation metric for BEN is its P/B ratio of 1.50. The P/B ratio is used to compare a stock's market value with its book value, which is defined as total assets minus total liabilities. For comparison, BX has a P/B of 3.89.Based on these metrics and many more, BEN holds a Value grade of B, while BX has a Value grade of F.Both BEN and BX are impressive stocks with solid earnings outlooks, but based on these valuation figures, we feel that BEN is the superior value option right now.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 Franklin Resources, Inc. (BEN): Free Stock Analysis Report Blackstone Group IncThe (BX): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research