But that all came to a screeching halt in the 2008 recession, said Cramer, when the notion of tangible book value, the matrix used to value a bank, became meaningless among incalculable loan losses. But now that time has passed and home sales and values are again on the rise, Cramer said a bank merger or acquisition would not shock him. Cramer said he doesn't know if the Regions Financial ( RF) rumors are true, but it certainly wouldn't surprise him. --Written by Scott Rutt in Washington, D.C. To contact the writer of this article, click here: Scott Rutt. To follow the writer on Twitter, go to http://twitter.com/scottrutt. To submit a news tip, send an email to: firstname.lastname@example.org. To watch replays of Cramer's video segments, visit the Mad Money page on CNBC.