Via WSJ, Apple plans to cut ties from Goldman Sachs as the banking institution behind their popular Apple Card credit card and Apple high yield savings account. The company sent a proposal to complete the exit within the next 12-15 months. Apple will be working to find a new bank backer for these products.
There had been talks of Apple partnering with Amex, but apparently they need to remain on the Mastercard network for the coming few years. Another rumor is the possibility of a Synchrony partnership.