By KEN SWEET CHARLOTTE, N.C. (AP) — JPMorgan Chase & Co., the nation's largest bank by assets, said its fourth quarter profits jumped by 42% from a year earlier, as the firm's investment banking division had a stellar quarter and its balance sheet improved despite the pandemic. The New York-based bank said it earned a profit of $12.14 billion, or $3.79 per share, up from a profit of $8.52 billion,