WalletHub: Jonathan Ernest, assistant professor at Weatherhead School of Management, shared what we can learn about the health of the economy from the terms offered by the market’s best credit cards. “First, we could look at the interest rates charged on carried balances for these cards,” he said. “If consumers are carrying more debt and unable to find other ways to borrow at low rates, and if banks are having to pay higher rates to entice others to save the dollars which they are then lending out through credit card balances, then we will see higher fixed rates.”