An inflation warning from JPMorgan Chase (NYSE:JPM) CEO Jamie Dimon sent JPM stock down despite an earnings beat. For the first quarter, the bank reported net income of $13.4 billion, $4.44 per share, on revenue of $41.9 billion. Analysts had expected earnings of $4.17 per share.JPM stock opened this morning at about $188 per share, and its market capitalization is about $544 billion.Dimon in the RoughNet interest income, the profit made from lending money, rose 11% from a year ago to $23.2 billion. But it ...