The former U.S. vice president turned climate crusader says Big Oil and the banks backing it still have huge financial incentives to stick with fossil fuels, even though their decision to do so is the leading cause of the climate crisis.

Fraser has a plan to reduce the number of management layers at Citi, shrink its workforce, speed up decision-making and give herself more control of the bank's five core businesses. "It's going to make some of our people very uncomfortable," she said.

A handful of banks concentrated in the Southeast U.S. are facing elevated charge-offs amid the liquidation of Mountain Express Oil. First Horizon Corp., which led a syndicated loan of more than $200 million to the bankrupt company, expects to take a $70 million hit.

It's a challenge Japan's largest lender must overcome as it focuses on growing its corporate banking presence in the US, said Fumitaka Nakahama, the firm's head of global corporate and investment banking. 

At least four of CEO Jane Fraser's senior deputies got new roles in the shakeup, which will result in a number of job cuts.

Concerns about large unrealized losses on bond investments have receded since the spring banking crisis, but the paper losses have started growing again in recent months. The worries today are less about banks' survival — and more about how much their margins will get squeezed.

Mergers and acquisitions are rebounding and equity capital markets are thawing, says C.S. Venkatakrishnan. That's a welcome forecast after a persistent slump sapped investment banking revenue across the industry.