Earlier quoted context omitted.
How does the bank make money when it's zero interest loan? Serious question, the article didn't mention anything about it. I'm sure it still costs a few bucks in fees to get the loan but isn't the interest where the real profit is?
Banks wouldn't offer a loan for zero interest if they have to "buy" money for interest. In these type of situations, they are either lending at negative interest rate from the central bank, or they are paying interest to central bank for "safekeeping" (central bank is at negative interest rate) or consumers are keeping money in banks at negative interest rate (less likely). What makes money for the bank is the differ…
In econ-101 it doesn't matter what the spread is, it isn't in itself rational to lend at 0%. That is taking on risk with no gain.
There must be some strange contortions in place to make this work. Whatever a "loan" is these days is going to be a totally regulatory construct with little connection to what they used to be way back when.