Dimon-led JPMorgan poised to become world's first $1 trillion bank

JPMorgan shares have long been viewed as carrying a "Jamie premium", which refers to the extra value investors attach to the bank because of its powerful CEO.

While its board has ramped up succession planning in recent years, the stock continues to benefit from Dimon's influence.

Despite having underperformed the S&P 500 .SPX and the S&P 500 banks .SPXBK indexes this year, JPMorgan trades at 14.63 times expected earnings over the next 12 months, according to data compiled by LSEG. That compares with 13.58 for the S&P 500 banks gauge.

"There is no doubt that he has been instrumental in delivering strong shareholder returns. While the backdrop from the U.S. economy has been helpful, the bank operates in very competitive markets so execution has been key," Sykes said.

JPMorgan did not immediately respond to a request for comment.