Investors looking for stocks in the Banks - Foreign sector might want to consider either Bank of Montreal (BMO) or HDFC Bank (HDB). 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.We have found that the best way to discover great value opportunities is to pair a strong Zacks Rank with a great grade in the Value category of our Style Scores system. The proven Zacks Rank puts an emphasis on earnings estimates and estimate revisions, while our Style Scores work to identify stocks with specific traits.Currently, Bank of Montreal has a Zacks Rank of #2 (Buy), while HDFC Bank has a Zacks Rank of #4 (Sell). This means that BMO's earnings estimate revision activity has been more impressive, so investors should feel comfortable with its improving analyst outlook. But this is just one piece of the puzzle for value investors.Value investors also tend to look at a number of traditional, tried-and-true figures to help them find stocks that they believe are undervalued at their current share price levels.The Style Score Value grade factors in a variety of key fundamental metrics, including the popular P/E ratio, P/S ratio, earnings yield, cash flow per share, and a number of other key stats that are commonly used by value investors.BMO currently has a forward P/E ratio of 10.79, while HDB has a forward P/E of 25.02. We also note that BMO has a PEG ratio of 0.96. This popular metric is similar to the widely-known P/E ratio, with the difference being that the PEG ratio also takes into account the company's expected earnings growth rate. HDB currently has a PEG ratio of 1.14.Another notable valuation metric for BMO is its P/B ratio of 1.65. The P/B is a method of comparing a stock's market value to its book value, which is defined as total assets minus total liabilities. By comparison, HDB has a P/B of 4.03.These metrics, and several others, help BMO earn a Value grade of B, while HDB has been given a Value grade of C.BMO is currently sporting an improving earnings outlook, which makes it stick out in our Zacks Rank model. And, based on the above valuation metrics, we feel that BMO is likely the superior value option right now. Investor Alert: Legal Marijuana Looking for big gains? Now is the time to get in on a young industry primed to skyrocket from $13.5 billion in 2021 to an expected $70.6 billion by 2028. After a clean sweep of 6 election referendums in 5 states, pot is now legal in 36 states plus D.C. Federal legalization is expected soon and that could kick start an even greater bonanza for investors. Zacks Investment Research has recently closed pot stocks that have shot up as high as +147.0% You’re invited to immediately check out Zacks’ Marijuana Moneymakers: An Investor’s Guide. It features a timely Watch List of pot stocks and ETFs with exceptional growth potential.Today, Download Marijuana Moneymakers FREE >>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 Bank Of Montreal (BMO): Free Stock Analysis Report HDFC Bank Limited (HDB): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research