Costello Research Market Efficiency

  • May 4, 2023

    Analysts and top executives are usually not on the same page –or even reading the same book.

  • March 15, 2023

    A George Mason University professor is working on ways to measure one of the great intangibles of today’s companies: employee talent.

  • September 22, 2022

    Exceptions may prove the rule, but they must first be explained. That is why finance researchers are drawn to the distress anomaly-- a well-documented phenomenon that challenges the risk-return paradigm in equity markets. Generally, higher-risk investments are expected to yield higher returns than safer, more stable securities. In recent years, however, studies have shown that high-credit-risk securities for companies in distress – i.e. when their already-low credit rating is being downgraded -- realize abnormally low returns compared to non-distressed securities of the same or lower risk.  Academics have proposed a range of rationales for this puzzle. Alexander Philipov, finance area chair and associate professor at George Mason University, says they mainly fall into two categories.