[ConjunctionJunction]

"Stannis has already ask for a loan from Iron Bank of Braavos and he was rejected. Also, Stannis was unable to articulate a plan to pay of the Iron Throne’s debt if he took the Iron Throne."

Stannis was rejected initially by the Iron Bank, but they changed their mind after the speech by Ser Davos.

[SvenMagnussen]

Okay, I was thinking Stannis went broke when he retreated from the Battle of Blackwater Bay. Apparently, the Iron Bank loaned Stannis money after that to hire the pirate a second time.