Joshua D. Coval

7 Results


Stimulus Surprise: Companies Retrench When Government Spends

New research from Harvard Business School suggests that federal spending in states appears to cause local businesses to cut back rather than grow. A conversation with Joshua Coval. Read More

The Economics of Structured Finance

This paper investigates the spectacular rise and fall of structured finance. HBS professor Joshua Coval, Princeton professor Jakub Jurek, and HBS professor Erik Stafford begin by examining how the structured finance machinery works. They construct simple examples of collateralized debt obligations (CDOs) that show how pooling and tranching a collection of assets permits credit enhancement of the senior claims. They then explore the challenge faced by rating agencies, examining, in particular, the parameter and modeling assumptions that are required to arrive at accurate ratings of structured finance products. They conclude with an assessment of what went wrong and the relative importance of rating agency errors, investor credulity, and perverse incentives and suspect behavior on the part of issuers, rating agencies, and borrowers. Read More

Risky Business with Structured Finance

How did the process of securitization transform trillions of dollars of risky assets into securities that many considered to be a safe bet? HBS professors Joshua D. Coval and Erik Stafford, with Princeton colleague Jakub Jurek, authors of a new paper, have ideas. Read More

Economic Catastrophe Bonds

Pooling economic assets into large portfolios and tranching them into sequential cash-flow claims has become a big business, generating record profits for both the Wall Street originators and the agencies that rate these securities. This paper by business economics doctoral student Jakub Jurek and HBS professors Joshua Coval and Erik Stafford investigates the pricing and risks of instruments created as a result of recent structured finance activities. It demonstrates that senior collateralized debt obligation (CDO) tranches have significantly different systematic risk exposures than their credit rating-matched, single-name counterparts, and should therefore command different risk premia. Read More

Behavioral Finance—Benefiting from Irrational Investors

Do investors really behave rationally? Behavioral finance researchers Malcolm Baker and Joshua Coval don't think humans are such cold calculators. One proof: Individual and even institutional investors often give in to inertia and hold on to shares in unwanted stock. And therein lays opportunity for investment managers and firms. Read More

“UpTick” Brings Wall Street Pressure to Students

Money managers work in a stressful, competitive pressure cooker that's hard to appreciate from the safety of a business management classroom. That's why HBS professors Joshua Coval and Erik Stafford invented upTick—a market simulation program that has students sweating and strategizing as they recreate classic market scenarios. Read More

Rating Fund Managers by the Company They Keep

A new method for rating the performance of mutual fund managers looks less at past performance, and more at where smart managers are investing. A Q&A with Harvard Business School professor Randolph B. Cohen. Read More