ETNs have a reputation for being opaque, and at least 47 of them have closed or been liquidated since the start of the year, according to a fund researcher. Read More WSJ.com: Markets...

In Translation: The output gap tells us whether the economy is operating near full capacity and has been used by Wall Street pros to predict changes in Fed monetary policy. Read More WSJ.com: Markets...

New research suggests that there are only four times a year—the beginning of each corporate-earnings season—when it’s worth it for investors to incur higher risk. Read More WSJ.com: Markets...

Delta, gamma, theta, vega and rho are among the Greek terms options traders use to describe the sensitivity of an option’s price to various factors. Here is what they mean. Read More WSJ.com: Markets...