Part I — The story
The story
Jamie Dimon has run JPMorgan Chase since 2005 and built it into the largest and most profitable bank in the United States, widely regarded as the most capable banker of his generation. His defining principle is risk discipline — the 'fortress balance sheet', keeping the bank strong enough to withstand any shock — which let JPMorgan emerge from the 2008 financial crisis not merely intact but strengthened, acquiring failing rivals while others collapsed. He had earlier been fired from Citigroup, a setback he turned into his defining comeback.
Dimon is known for deep operational command, blunt candour, and preparing relentlessly for the next crisis even in good times — famously planning for the 'bad room' scenario. His influential annual shareholder letters range far beyond banking into the economy and society. He is a study in risk discipline as the foundation of durable institutions, in turning a firing into a comeback, and in the leadership value of preparing for disaster when everything looks fine.
Part II — The playbook
The playbook
Keep a fortress balance sheet
Dimon kept JPMorgan strong enough to withstand any shock — and buy when rivals failed.
Prepare for crisis in good times
He plans relentlessly for disaster even when everything looks fine.
Turn a firing into a comeback
Fired from Citigroup, he returned to build the world's top bank.
In their words
I always prepare for the bad room.
Problems don't age well.
You've got to have the courage to make tough decisions and the humility to know when you're wrong.
What to read next
- Last Man Standing — Duff McDonald
Why this matters
The thinking behind these decisions connects to models you can study directly:
Frequently asked questions
What is Jamie Dimon's 'fortress balance sheet'?
His core doctrine of keeping JPMorgan strong enough to withstand any shock — which let the bank emerge from the 2008 crisis strengthened, acquiring failing rivals while others collapsed.
What's notable about Dimon's career path?
He was fired from Citigroup earlier in his career — a setback he turned into his defining comeback, going on to run JPMorgan Chase and become the most capable banker of his generation.