Many public funds don't adhere to basic norms of modern money management and most don't even appear to make an effort to match their investment strategies with their future financial obligations. "As [sovereign wealth funds] have grown, they appear to be demonstrating an increasing risk appetite, very little transparency and virtually no clarity of objectives," write three researchers, including Wharton professor of insurance and risk management Olivia Mitchell, in a soon-to be-published paper titled, "Managing Public Investment Funds: Best Practices and New Questions."

Media outlets and regulators have scrutinized the securitization of risky residential mortgages for their role in the global credit crunch. Not as much attention has been paid to their less-risky cousin, the commercial mortgage-backed securities (CMBS) market, which has been tarnished by problems on the residential side. Despite their superior fundamentals, says one Wharton professor, the CMBS market is "pretty much gone." The question now: Can it come back?

"There's really nothing illegal about it" is a phrase often heard in descriptions of the practice of shorting, or short-selling, which are essentially bets that a stock price will decline. But after some market watchers accused short-sellers of unfairly depressing the stock prices of several key financial institutions, the Securities and Exchange Commission imposed new rules. Wharton finance professors Marshall Blume and Franklin Allen suggest the impact will be minimal.

Companies ranging from Yahoo and CSX to Motorola, H.J. Heinz and Time Warner have been the target of proxy wars over the past few years as disgruntled shareholders try to force changes in corporate behavior and/or top management. But while proxy battles these days are more prevalent and easier to launch than ever, it's unclear exactly what they accomplish. As one Wharton professor notes: "It's a good thing for shareholders that these activists rattle the cage. Whether they ultimately create value for shareholders is another issue."