If you're on the hunt for cheap big bank stocks, then you'll want to take a look at Citigroup (NYSE:C), Regions Financial (NYSE:RF), and KeyCorp (NYSE:KEY), as well as the other two big bank stocks revealed in the slideshow below.

While there are undoubtedly reasons that the five big banks highlighted therein trade for measly price-to-tangible-book-value ratios, the potential upside associated with their low valuations nevertheless makes shares of Citigroup, Regions Financial, and KeyCorp seem attractive at first glance.

Data source: Valuation data for Citigroup, Bank of America, Capital One, KeyCorp, and Regions Financial was sourced from YCharts.com. 

John Maxfield has no position in any stocks mentioned. The Motley Fool recommends Bank of America. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.