Wall Street

Despite changes after the 2008 financial crisis, Neel Kashkari, one of the leading figures in the federal bailout, says major banks are still at risk. "I don't think we've gone far enough," he says.

His proposed "speculation tax" — a small levy on every stock, bond or derivative sold in the U.S. — would fund higher education. Estimates of how much revenue it might raise vary greatly.

Fears about slowing global growth have sent the Dow Jones industrial average down by about 10 percent this month since the start of the year.

Investor Jack Bogle is leading a populist revolution on Wall Street. He wants everyday Americans to make a lot more money in the stock market and give less of their returns away to financial firms.

Roboadvisers are online financial managers that are guided by an algorithm, not a broker. Increasingly, millennials are shunning the human touch in favor of these low-cost alternatives.