Let's look at the Big Picture. The US is a "consumer driven" economy. The consumer relies on credit to satisfy his/her fix. The economy continues to show lackluster growth that causes our friend at the Fed Ben Bernanke to keep "interest rates" low---almost 0 %. That near 0% is what our friends "the Banksters" pay to borrow money. You dear consumer if you need to carry a balance with an institution such as Bank America will be paying just about 30% annually on that balance.
Thank goodness the Fed is keeping rates low!