The US economy appears to be improving. For the first time in its history, the Standard & Poor's 500 market index closed above 1,700 points. And the number of Americans filing for unemployment benefits is the lowest since 2007.<br />But there is also evidence that some of the Wall Street behaviour that led to the 2008 financial crisis is happening again. Five years on, Standart & Poor's is once again being accused of inflating credit ratings.<br /><br />Al Jazeera's Kristen Saloomey reports from New York.
