[bboreham]

TransferWise reserve the right to cancel out transaction if the market moved too far.

I think you're right they would eat a fairly big loss to avoid the bad press this would generate, but there is ultimately a limit.

It bugs me this aspect of their business model is never cited, so most people assume they are selling the same product as the banks. They're not: banks take the risk; TransferWise leave it with the customer.