A $20 billion deal would be among the largest in JPMorgan's history and could invite regulatory scrutiny given its position as the largest U.S. bank by assets.

Dimon has been renowned for being candid about issues that matter concerning the economy. However, in his latest shareholder letter, Dimon talked about something more serious…

A $20 billion deal would be among the largest in JPMorgan's history and could invite regulatory scrutiny given its position as the largest U.S. bank by assets.