Let’s say you buy a great new TV for $2,400 with the promise that you will pay no interest if you pay it off in 24 months. You faithfully pay $100 every month, but in the final month, you have unexpected expenses, so you pay only $25. After all, you only owe $100 now, right? The next month, you expect to pay $75 plus one month’s interest on that amount—but your bill is a shocker. You discover you are now being charged all the interest, on the entire amount, going back to the date two years ago when you purchased that TV. That’s how certain stores seem to be managing some “no interest” financing arrangements when you use their store credit cards for large purchases, and we’re currently investigating these practices.